(chess) A draw forced by one player by putting the opponent's king in a potentially infinite series of checks.

An act or state of something causing itself to continue to exist.

plural of perpetual license

plural of self-perpetuation

plural of perpetual curate

(historical) A resident parish priest or incumbent curate within the United Church of England and Ireland, supported by a cash stipend, usually maintained by an endowment fund, and having no ancient right to income from tithe or glebe.

(Internet slang) Synonym of Eternal September

(accounting) A system of maintaining a business' inventory in which changes to the inventory are recorded in real time, so that the inventory is always accurate.

(physics, pseudoscience) A hypothetical device that exhibits perpetual motion, especially one that does useful work with no input of energy.

plural of perpetual motion machine