OR circuit

UK: /ɔː/ US: (ôr)

WordReference Random House Unabridged Dictionary of American English © 2025

OR′ cir′cuit  (ôr), [Computers.]

1. Computing a circuit that is energized when any of its inputs are energized. Also called OR gate. 

• see or¹ (def. 6) so called from the disjunctive operation of such circuits

Collins Concise English Dictionary © HarperCollins Publishers::

OR circuit, OR gate / ɔː/ noun

1. a logic circuit having two or more input wires and one output wire that gives a high-voltage output signal if one or more input signals are at a high voltage: used extensively as a basic circuit in computers
   Compare AND circuit, NAND circuit

Etymology: 20th Century: so named from its similarity to the function of or in logical constructions