The aspect of a verb that expresses a completed completed action

Wiktionary Word definitions in Wiktionary
a. 1 (context grammar English) of, or relative to the perfect tense or perfective aspect. 2 (context obsolete English) Tending to make perfect, or to bring to perfection. n. (context grammar English) a perfective verb form

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Perfective \Per*fect"ive\, a. Tending or conducing to make perfect, or to bring to perfection; -- usually followed by of. ``A perfective alteration.'' --Fuller. Actions perfective of their natures. --Ray.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1590s, from Medieval Latin perfectivus , from Latin perfect- , past participle stem of perficere (see perfect (adj.)). Grammatical use is from 1844.

WordNet Word definitions in WordNet
n. a tense of verbs used in describing action that has been completed (sometimes regarded as perfective aspect) [syn: perfective tense , perfect , perfect tense ] the aspect of a verb that expresses a completed completed action [syn: perfective aspect ]