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1 definition found
 for defective number
From The Collaborative International Dictionary of English v.0.48 :

  Imperfect \Im*per"fect\, a. [L. imperfectus: pref. im- not +
     perfectus perfect: cf. F imparfait, whence OE. imparfit. See
     Perfect.]
     1. Not perfect; not complete in all its parts; wanting a
        part; deective; deficient.
        [1913 Webster]
  
              Something he left imperfect in the state. --Shak.
        [1913 Webster]
  
              Why, then, your other senses grow imperfect. --Shak.
        [1913 Webster]
  
     2. Wanting in some elementary organ that is essential to
        successful or normal activity.
        [1913 Webster]
  
              He . . . stammered like a child, or an amazed,
              imperfect person.                     --Jer. Taylor.
        [1913 Webster]
  
     3. Not fulfilling its design; not realizing an ideal; not
        conformed to a standard or rule; not satisfying the taste
        or conscience; esthetically or morally defective.
        [1913 Webster]
  
              Nothing imperfect or deficient left
              Of all that he created.               --Milton.
        [1913 Webster]
  
              Then say not man's imperfect, Heaven in fault;
              Say rather, man's as perfect as he ought. --Pope.
        [1913 Webster]
  
     Imperfect arch, an arch of less than a semicircle; a skew
        arch.
  
     Imperfect cadence (Mus.), one not ending with the tonic,
        but with the dominant or some other chord; one not giving
        complete rest; a half close.
  
     Imperfect consonances (Mus.), chords like the third and
        sixth, whose ratios are less simple than those of the
        fifth and forth.
  
     Imperfect flower (Bot.), a flower wanting either stamens or
        pistils. --Gray.
  
     Imperfect interval (Mus.), one a semitone less than
        perfect; as, an imperfect fifth.
  
     Imperfect number (Math.), a number either greater or less
        than the sum of its several divisors; in the former case,
        it is called also a defective number; in the latter, an
        abundant number.
  
     Imperfect obligations (Law), obligations as of charity or
        gratitude, which cannot be enforced by law.
  
     Imperfect power (Math.), a number which can not be produced
        by taking any whole number or vulgar fraction, as a
        factor, the number of times indicated by the power; thus,
        9 is a perfect square, but an imperfect cube.
  
     Imperfect tense (Gram.), a tense expressing past time and
        incomplete action.
        [1913 Webster]

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