imperfective

UK: /ˌɪmpəˈfɛktɪv/ US: (im′pər fek′tiv)

WordReference Random House Unabridged Dictionary of American English © 2025

im•per•fec•tive  (im′pər fek′tiv), [Gram.]
adj. 

1. Grammar noting an aspect of the verb, as in Russian, that indicates incompleteness of the action or state at a temporal point of reference.

n. 

2. Grammar the imperfective aspect.
3. Grammar a verb in this aspect.

• imperfect + -ive 1670–80

Collins Concise English Dictionary © HarperCollins Publishers::

imperfective / ˌɪmpəˈfɛktɪv/ adjective

1. denoting an aspect of the verb in some languages, including English, used to indicate that the action is in progress without regard to its completion
   Compare perfective

noun

1. the imperfective aspect of a verb
2. a verb in this aspect

ˌimperˈfectively adverb