imperfect

Short definition from Wiktionary

Adjective

1. 1
   Not perfect,
2. 2
   Unisexual: having either male (with stamens) or female (with pistil) flowers, but not with both.
3. 3
   Known or expected to be polyphyletic, as of a form taxon.
4. 4
   Representing a continuing or repeated action.
5. 5
   Lacking some elementary organ that is essential to successful or normal activity.

Noun

1. 1
   Something having a minor flaw.
2. 2
   A tense of verbs used in describing a past action that is incomplete or continuous.

Verb

1. 1
   to make imperfect