noun

1. Something having a minor flaw

2. (grammar) a tense of verbs used in describing a past action that is incomplete or continuous

Synonyms: preterimperfect

verb

1. To make imperfect

adjective

1. Not perfect

2. Unisexual: having either male (with stamens) or female (with pistil) flowers, but not with both.

3. Known or expected to be polyphyletic, as of a form taxon.

Synonyms: defective, fallible, faultful, faulty