im•per•fec•tivePronunciation: (im"pur-fek'tiv), [key] Gram.
noting an aspect of the verb, as in Russian, that indicates incompleteness of the action or state at a temporal point of reference.
the imperfective aspect.
a verb in this aspect.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.