from
The Collaborative International Dictionary of English v.0.48
Perfective \Per*fect"ive\ (p[~e]r*f[e^]k"t[i^]v), a.
1. Tending or conducing to make perfect, or to bring to
perfection; -- usually followed by of. "A perfective
alteration." --Fuller.
[1913 Webster]
Actions perfective of their natures. --Ray.
[1913 Webster]
2. (Gram.) 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.
[PJC]