imperfect(redirected from imperf.)
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[O.Fr., from Lat.,=time], in the grammar of many languages, a category of time distinctions expressed by any conjugated form of a verb. In Latin inflection the tense of a verb is indicated by a suffix that also indicates the verb's voice, mood, person, and number.
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a. (of flowers) lacking functional stamens or pistils
b. (of fungi) not undergoing sexual reproduction
2. Law (of a trust, an obligation, etc.) lacking some necessary formality to make effective or binding; incomplete; legally unenforceable
a. (of a cadence) proceeding to the dominant from the tonic, subdominant, or any chord other than the dominant
b. of or relating to all intervals other than the fourth, fifth, and octave