plural of perfectibility

A believer in perfectibility.

plural of perfect number

(idiomatic) To insist on the total realization of a goal and reject any compromise, thereby decreasing the chance of achieving even a part of that goal.

plural of perfect game

Perfection.

plural of perfectissimate

(history) the office of a perfectissimus

(music) A musical interval of the Western twelve-semitone system consisting of twelve semitones and spanning eight degrees of the diatonic scale. It is enharmonically equivalent to an augmented seventh and is commonly referred to as an octave.

plural of perfective aspect