imperfect

[im-pur-fikt]
adjective
1.
of, pertaining to, or characterized by defects or weaknesses: imperfect vision.
2.
not perfect; lacking completeness: imperfect knowledge.
3.
Grammar. noting action or state still in process at some temporal point of reference, particularly in the past.
4.
Law. being without legal effect or support; unenforceable.
5.
Botany. (of a flower) diclinous.
6.
Music. of or relating to the interval of a major or minor third or sixth. Compare perfect ( def 12a ).
noun Grammar.
7.
the imperfect tense.
8.
another verb formation or construction with imperfect meaning.
9.
a form in the imperfect, as Latin portābam, “I was carrying.”

Origin:
1300–50; < Latin imperfectus unfinished (see im-2, perfect); replacing Middle English imparfit < Middle French imparfait < Latin, as above

imperfectly, adverb
imperfectness, noun


1. defective, faulty. 2. incomplete, underdeveloped; immature.


2. complete, developed.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
imperfect (ɪmˈpɜːfɪkt)
 
adj
1.  exhibiting or characterized by faults, mistakes, etc; defective
2.  not complete or finished; deficient
3.  botany
 a.  (of flowers) lacking functional stamens or pistils
 b.  (of fungi) not undergoing sexual reproduction
4.  grammar denoting a tense of verbs used most commonly in describing continuous or repeated past actions or events, as for example was walking as opposed to walked
5.  law See also executory (of a trust, an obligation, etc) lacking some necessary formality to make effective or binding; incomplete; legally unenforceable
6.  music
 a.  (of a cadence) proceeding to the dominant from the tonic, subdominant, or any chord other than the dominant
 b.  Compare perfect of or relating to all intervals other than the fourth, fifth, and octave
 
n
7.  grammar
 a.  the imperfect tense
 b.  a verb in this tense
 
im'perfectly
 
adv
 
im'perfectness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

imperfect
mid-14c., imperfite, from O.Fr. imparfait, from L. imperfectus "unfinished, incomplete." Replaced mid-16c. by the Latin form.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
It's gotten harder than ever to find an imperfect heroine in a series who is actually flawed.
They're arguing that a perfect machine would be imperfect.
History is a tissue of such tender episodes, if also an imperfect record of
  them.
Sitting atop the narrow shelf above the sink, imperfect teacups make good
  holders for air plants.
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