(speedrunning) Of an input, trick etc., to only be possible for the duration of a single frame.

(number theory) A number that is the sum of all of its divisors except itself.

A verb form indicating that an action or state has been completed at the present time, in the past, or shall be completed in the future.

Perfect in appearance as with the subjects in paintings or photographs, without the common imperfections of real life.

(grammar) A tense that expresses action completed at some time in the future; in English it is formed by use of will have (or shall have) and a past participle

(grammar) A perfect tense that expresses action in the past (usually completed) with consequences in the present time.

(grammar) A combination of the conditional mood and the perfect tense, roughly corresponding to English 'I would have...'

(baseball) A game in which every batter on one team is retired without reaching base. / (bowling) A game in which the highest score possible is achieved, entailing a strike in every frame.

(music, uncountable) The ability to identify a note by name on hearing it, or to re-create a specified note from memory, without the benefit of an externally provided reference pitch.

plural of perfect tense