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OR circuit

[awr]
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noun Computers.
  1. a circuit that is energized when any of its inputs are energized.
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Origin of OR circuit

1950–55; so called from the disjunctive operation of such circuits; see or1(def 6)
Also called OR gate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for or gate

OR circuit

OR gate

noun
  1. computing 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 computersCompare AND circuit, NAND circuit
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Word Origin

C20: so named from its similarity to the function of or in logical constructions
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012