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6 definitions found
 for Bug
From The Collaborative International Dictionary of English v.0.48 :

  Bug \Bug\ (b[u^]g), n. [OE. bugge, fr. W. bwg, bwgan, hobgoblin,
     scarecrow, bugbear. Cf. Bogey, Boggle.]
     1. A bugbear; anything which terrifies. [Obs.]
        [1913 Webster]
  
              Sir, spare your threats:
              The bug which you would fright me with I seek.
                                                    --Shak.
        [1913 Webster]
  
     2. (Zool.) A general name applied to various insects
        belonging to the Hemiptera; as, the squash bug; the chinch
        bug, etc.
        [1913 Webster]
  
     3. (Zool.) An insect of the genus Cimex, especially the
        bedbug ({Cimex lectularius). See Bedbug.
        [1913 Webster]
  
     4. (Zool.) One of various species of Coleoptera; as, the
        ladybug; potato bug, etc.; loosely, any beetle.
        [1913 Webster]
  
     5. (Zool.) One of certain kinds of Crustacea; as, the sow
        bug; pill bug; bait bug; salve bug, etc.
        [1913 Webster]
  
     Note: According to popular usage in England and among
           housekeepers in America around 1900, bug, when not
           joined with some qualifying word, was used specifically
           for bedbug. As a general term it is now used very
           loosely in America as a colloquial term to mean any
           small crawling thing, such as an insect or arachnid,
           and was formerly used still more loosely in England.
           "God's rare workmanship in the ant, the poorest bug
           that creeps." --Rogers (--Naaman). "This bug with
           gilded wings." --Pope.
           [1913 Webster +PJC]
  
     6. (Computers) An error in the coding of a computer program,
        especially one causing the program to malfunction or fail.
        See, for example, year 2000 bug. "That's not a bug, it's
        a feature!"
        [PJC]
  
     7. Any unexpected defect or flaw, such as in a machine or a
        plan.
        [PJC]
  
     8. A hidden electronic listening device, used to hear or
        record conversations surreptitiously.
        [PJC]
  
     9. An infectious microorganism; a germ[4]. [Colloq.]
        [PJC]
  
     10. An undiagnosed illness, usually mild, believed to be
         caused by an infectious organism. [Colloq.]
  
     Note: In some communities in the 1990's, the incidence of
           AIDS is high and AIDS is referred to colloquially as
           "the bug".
           [PJC]
  
     11. An enthusiast; -- used mostly in combination, as a camera
         bug. [Colloq.]
         [PJC]
  
     Bait bug. See under Bait.
  
     Bug word, swaggering or threatening language. [Obs.]
        --Beau. & Fl.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Bug \Bug\ (b[u^]g), v. t.
     to annoy; to bother or pester.
     [PJC] Bugaboo

From WordNet (r) 3.0 (2006) :

  bug
      n 1: general term for any insect or similar creeping or crawling
           invertebrate
      2: a fault or defect in a computer program, system, or machine
         [syn: bug, glitch]
      3: a small hidden microphone; for listening secretly
      4: insects with sucking mouthparts and forewings thickened and
         leathery at the base; usually show incomplete metamorphosis
         [syn: hemipterous insect, bug, hemipteran,
         hemipteron]
      5: a minute life form (especially a disease-causing bacterium);
         the term is not in technical use [syn: microbe, bug,
         germ]
      v 1: annoy persistently; "The children teased the boy because of
           his stammer" [syn: tease, badger, pester, bug,
           beleaguer]
      2: tap a telephone or telegraph wire to get information; "The
         FBI was tapping the phone line of the suspected spy"; "Is
         this hotel room bugged?" [syn: wiretap, tap, intercept,
         bug]

From Moby Thesaurus II by Grady Ward, 1.0 :

  381 Moby Thesaurus words for "bug":
     ALGOL, COBOL, FORTRAN, Mumbo Jumbo, abrade, addict, addle,
     addle the wits, adenovirus, aerobe, aerobic bacteria, aficionado,
     aggravate, agitate, alphabetic data, alphanumeric code, amoeba,
     anaerobe, anaerobic bacteria, angular data, annoy, apply pressure,
     arachnid, arthropod, assembler, attend, attend to, auscultate,
     bacillus, bacteria, bacterium, badger, bag, bait, ball up, balloon,
     be all ears, be at, becloud, bedazzle, bedevil, beetle, befuddle,
     belly, belly out, bend an ear, beset, besiege, bewilder, bigot,
     bilge, billow, binary digit, binary scale, binary system, bit,
     blandish, blemish, bogey, bogeyman, boggart, bogle, booger,
     boogerman, boogeyman, bother, bouge, bristle, brown off, buff,
     bugaboo, bugbear, bugger, bulge, bullyrag, burn up, buttonhole,
     byte, cajole, carp at, case, catch, caterpillar, centipede, chafe,
     chilopod, chivy, cloud, coax, coccus, cock the ears, collector,
     command pulses, commands, compiler, computer code,
     computer language, computer program, confuse, control signals,
     controlled quantity, convulse, correcting signals, crack, crank,
     craze, crazy fancy, daddy longlegs, data, daze, dazzle, defect,
     defection, deficiency, demon, devil, devotee, dilate, diplopod,
     discombobulate, discomfit, discompose, disconcert,
     disease-producing microorganism, disorganize, disorient, distemper,
     distend, distract, disturb, dog, drawback, dun, eager beaver,
     eavesdrop, echovirus, embarrass, embroil, energumen, entangle,
     enterovirus, enthusiasm, enthusiast, error, error signals,
     examine by ear, exasperate, exercise, exert pressure, faddist,
     failing, failure, fan, fanatic, fanatico, fascination, fash, fault,
     faute, fee-faw-fum, feedback pulses, feedback signals, fiend,
     film data, filterable virus, flaw, flummox, flurry, fluster,
     flutter, fly, fog, foible, frailty, freak, fret, fret at, fuddle,
     fungus, furor, furore, fuss, fuss at, gall, germ, get,
     give attention, give audience to, give ear, goggle,
     gram-negative bacteria, gram-positive bacteria, great one for,
     gripe, harass, hark, harry, harvestman, hassle, hear, hear out,
     hearken, heckle, hector, heed, henpeck, hexadecimal system,
     hexapod, hobbyist, hole, hound, imperfection, importune,
     inadequacy, infatuate, infatuation, infirmity, information,
     input data, input quantity, insect, instructions, intercept, irk,
     kink, larva, lend an ear, listen, listen at, listen in, listen to,
     little problem, lunatic fringe, machine language, maggot,
     make a reconnaissance, mania, maniac, manic-depressive psychosis,
     maze, message, microbe, microorganism, microphone, miff, mike,
     millepede, millipede, mist, mite, mix up, moider, mold, molest,
     monomaniac, muddle, multiple messages, nag, nag at, needle, nettle,
     nibble at, noise, nonfilterable virus, nudzh, numeric data, nut,
     nymph, octal system, oscillograph data, output data,
     output quantity, passion, pathogen, peck at, peep, peeve, perplex,
     persecute, perturb, pester, pick at, pick on, picornavirus, pique,
     plague, play, play the spy, pluck the beard, ply, polar data,
     pooch, pop, pother, pouch, pout, press, pressure, problem,
     protozoa, protozoon, provoke, psych, punch-card data, pursuer,
     push, put out, put under surveillance, radiomicrophone, rage,
     raise hell, random data, rattle, reconnoiter, rectangular data,
     reference quantity, reovirus, rhapsodist, rhinovirus, rickettsia,
     ride, rift, rile, roil, round out, ruffle, ruly English, scorpion,
     scout, scout out, shortcoming, signals, single messages, sit in on,
     snag, something missing, spider, spirillum, spirochete, spook,
     spore, spy, spy out, stake out, staphylococcus, streptococcus,
     sucker for, swell, swell out, taint, tap, tarantula, tease, throw,
     throw into confusion, tick, torment, trouble, try the patience,
     trypanosome, tweak the nose, unorganized data, unsettle, upset,
     urge, vex, vibrio, virus, visible-speech data, visionary,
     vulnerable place, watch, weak link, weak point, weakness, wheedle,
     wiretap, work on, worry, yap at, zealot
  
  

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  bug
   n.
  
      An unwanted and unintended property of a program or piece of hardware, esp.
      one that causes it to malfunction. Antonym of feature. Examples: ?There's
      a bug in the editor: it writes things out backwards.? ?The system crashed
      because of a hardware bug.? ?Fred is a winner, but he has a few bugs?
      (i.e., Fred is a good guy, but he has a few personality problems).
  
      Historical note: Admiral Grace Hopper (an early computing pioneer better
      known for inventing COBOL) liked to tell a story in which a technician
      solved a glitch in the Harvard Mark II machine by pulling an actual
      insect out from between the contacts of one of its relays, and she
      subsequently promulgated bug in its hackish sense as a joke about the
      incident (though, as she was careful to admit, she was not there when it
      happened). For many years the logbook associated with the incident and the
      actual bug in question (a moth) sat in a display case at the Naval Surface
      Warfare Center (NSWC). The entire story, with a picture of the logbook and
      the moth taped into it, is recorded in the Annals of the History of
      Computing, Vol. 3, No. 3 (July 1981), pp. 285--286.
  
      The text of the log entry (from September 9, 1947), reads ?1545 Relay #70
      Panel F (moth) in relay. First actual case of bug being found?. This
      wording establishes that the term was already in use at the time in its
      current specific sense ? and Hopper herself reports that the term bug was
      regularly applied to problems in radar electronics during WWII.
  
      [bugpic-col]
  
      The ?original bug? (the caption date is incorrect)
  
      Indeed, the use of bug to mean an industrial defect was already established
      in Thomas Edison's time, and a more specific and rather modern use can be
      found in an electrical handbook from 1896 (Hawkin's New Catechism of
      Electricity, Theo. Audel & Co.) which says: ?The term ?bug? is used to a
      limited extent to designate any fault or trouble in the connections or
      working of electric apparatus.? It further notes that the term is ?said to
      have originated in quadruplex telegraphy and have been transferred to all
      electric apparatus.?
  
      The latter observation may explain a common folk etymology of the term;
      that it came from telephone company usage, in which ?bugs in a telephone
      cable? were blamed for noisy lines. Though this derivation seems to be
      mistaken, it may well be a distorted memory of a joke first current among
      telegraph operators more than a century ago!
  
      Or perhaps not a joke. Historians of the field inform us that the term ?bug
      ? was regularly used in the early days of telegraphy to refer to a variety
      of semi-automatic telegraphy keyers that would send a string of dots if you
      held them down. In fact, the Vibroplex keyers (which were among the most
      common of this type) even had a graphic of a beetle on them (and still do)!
      While the ability to send repeated dots automatically was very useful for
      professional morse code operators, these were also significantly trickier
      to use than the older manual keyers, and it could take some practice to
      ensure one didn't introduce extraneous dots into the code by holding the
      key down a fraction too long. In the hands of an inexperienced operator, a
      Vibroplex ?bug? on the line could mean that a lot of garbled Morse would
      soon be coming your way.
  
      Further, the term ?bug? has long been used among radio technicians to
      describe a device that converts electromagnetic field variations into
      acoustic signals. It is used to trace radio interference and look for
      dangerous radio emissions. Radio community usage derives from the
      roach-like shape of the first versions used by 19th century physicists. The
      first versions consisted of a coil of wire (roach body), with the two wire
      ends sticking out and bent back to nearly touch forming a spark gap (roach
      antennae). The bug is to the radio technician what the stethoscope is to
      the stereotypical medical doctor. This sense is almost certainly ancestral
      to modern use of ?bug? for a covert monitoring device, but may also have
      contributed to the use of ?bug? for the effects of radio interference
      itself.
  
      Actually, use of bug in the general sense of a disruptive event goes back
      to Shakespeare! (Henry VI, part III - Act V, Scene II: King Edward: ?So,
      lie thou there. Die thou; and die our fear; For Warwick was a bug that
      fear'd us all.?) In the first edition of Samuel Johnson's dictionary one
      meaning of bug is ?A frightful object; a walking spectre?; this is traced
      to ?bugbear?, a Welsh term for a variety of mythological monster which (to
      complete the circle) has recently been reintroduced into the popular
      lexicon through fantasy role-playing games.
  
      In any case, in jargon the word almost never refers to insects. Here is a
      plausible conversation that never actually happened: ?There is a bug in
      this ant farm!? ?What do you mean? I don't see any ants in it.? ?That's the
      bug.?
  
      A careful discussion of the etymological issues can be found in a paper by
      Fred R. Shapiro, 1987, ?Entomology of the Computer Bug: History and
      Folklore?, American Speech 62(4):376-378.
  
      [There has been a widespread myth that the original bug was moved to the
      Smithsonian, and an earlier version of this entry so asserted. A
      correspondent who thought to check discovered that the bug was not there.
      While investigating this in late 1990, your editor discovered that the NSWC
      still had the bug, but had unsuccessfully tried to get the Smithsonian to
      accept it ? and that the present curator of their History of American
      Technology Museum didn't know this and agreed that it would make a
      worthwhile exhibit. It was moved to the Smithsonian in mid-1991, but due to
      space and money constraints was not actually exhibited for years
      afterwards. Thus, the process of investigating the original-computer-bug
      bug fixed it in an entirely unexpected way, by making the myth true! ?ESR]
  
      [73-07-29]
  
      It helps to remember that this dates from 1973.
  

From The Free On-line Dictionary of Computing (18 March 2015) :

  bug
  bugs
  defect
  snag
  
      An unwanted and unintended property of a
     program or piece of hardware, especially one that causes
     it to malfunction.  Antonym of feature.  E.g. "There's a bug
     in the editor: it writes things out backward."  The
     identification and removal of bugs in a program is called
     "{debugging".
  
     Admiral Grace Hopper (an early computing pioneer better
     known for inventing COBOL) liked to tell a story in which a
     technician solved a glitch in the Harvard Mark II machine
     by pulling an actual insect out from between the contacts of
     one of its relays, and she subsequently promulgated bug in
     its hackish sense as a joke about the incident (though, as she
     was careful to admit, she was not there when it happened).
     For many years the logbook associated with the incident and
     the actual bug in question (a moth) sat in a display case at
     the Naval Surface Warfare Center (NSWC).  The entire story,
     with a picture of the logbook and the moth taped into it, is
     recorded in the "Annals of the History of Computing", Vol. 3,
     No. 3 (July 1981), pp. 285--286.
  
     The text of the log entry (from September 9, 1947), reads
     "1545 Relay #70 Panel F (moth) in relay.  First actual case of
     bug being found".  This wording establishes that the term was
     already in use at the time in its current specific sense - and
     Hopper herself reports that the term "bug" was regularly
     applied to problems in radar electronics during WWII.
  
     Indeed, the use of "bug" to mean an industrial defect was
     already established in Thomas Edison's time, and a more
     specific and rather modern use can be found in an electrical
     handbook from 1896 ("Hawkin's New Catechism of Electricity",
     Theo. Audel & Co.)  which says: "The term "bug" is used to a
     limited extent to designate any fault or trouble in the
     connections or working of electric apparatus."  It further
     notes that the term is "said to have originated in
     quadruplex telegraphy and have been transferred to all
     electric apparatus."
  
     The latter observation may explain a common folk etymology of
     the term; that it came from telephone company usage, in which
     "bugs in a telephone cable" were blamed for noisy lines.
     Though this derivation seems to be mistaken, it may well be a
     distorted memory of a joke first current among *telegraph*
     operators more than a century ago!
  
     Actually, use of "bug" in the general sense of a disruptive
     event goes back to Shakespeare!  In the first edition of
     Samuel Johnson's dictionary one meaning of "bug" is "A
     frightful object; a walking spectre"; this is traced to
     "bugbear", a Welsh term for a variety of mythological monster
     which (to complete the circle) has recently been reintroduced
     into the popular lexicon through fantasy role-playing games.
  
     In any case, in jargon the word almost never refers to
     insects.  Here is a plausible conversation that never actually
     happened:
  
     "There is a bug in this ant farm!"
  
     "What do you mean?  I don't see any ants in it."
  
     "That's the bug."
  
     [There has been a widespread myth that the original bug was
     moved to the Smithsonian, and an earlier version of this entry
     so asserted.  A correspondent who thought to check discovered
     that the bug was not there.  While investigating this in late
     1990, your editor discovered that the NSWC still had the bug,
     but had unsuccessfully tried to get the Smithsonian to accept
     it - and that the present curator of their History of
     American Technology Museum didn't know this and agreed that it
     would make a worthwhile exhibit.  It was moved to the
     Smithsonian in mid-1991, but due to space and money
     constraints has not yet been exhibited.  Thus, the process of
     investigating the original-computer-bug bug fixed it in an
     entirely unexpected way, by making the myth true!  - ESR]
  
     [{Jargon File]
  
     (1999-06-29)
  

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