Perfective aspect
grammatical aspect that describes an action viewed as a simple whole, i.e. a unit without interior composition

The perfective aspect (abbreviated pfv), sometimes called the aoristic aspect, is a grammatical aspect that describes an action viewed as a simple whole, i.e., a unit without interior composition. The perfective aspect is distinguished from the imperfective aspect, which presents an event as having internal structure (such as ongoing, continuous, or habitual actions). The term perfective should be distinguished from perfect (see below).
The distinction between perfective and imperfective is more important in some languages than others. In Slavic languages, it is central to the verb system. In other languages such as German, the same form such as ich ging ("I went", "I was going") can be used perfectively or imperfectively without grammatical distinction. In other languages such as Latin, the distinction between perfective and imperfective is made only in the past tense (e.g., Latin veni "I came" vs. veniebam "I was coming", "I used to come"). However, perfective should not be confused with tense—perfective aspect can apply to events in the past, present, or future.
The perfective is often thought of as for events of short duration (e.g., "John killed the wasp").
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This entry incorporates text from “Perfective aspect” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.