01 a. Tending or conducing to make perfect, or to bring to perfection; -- usually followed by of.
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1.
Tending or conducing to make perfect, or to bring to perfection; -- usually followed by of.“Actions perfective of their natures.” — Ray.
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2.
Denoting an aspect of verbs which indicates completion of an action, and is sometimes explicitly marked in verbal inflection, as in the Russian language; as, the perfective form of a verb. The use of a perfective form rather than the simple past indicates reference to a completed event, rather than to a process that took place in the past.(Gram.)