| exclusive or [ik¦sklü·siv `ȯr] COMPUTER SCIENCE An instruction which performs the ``exclusive or'' operation on a bit-by-bit basis for its two operand words, usually storing the result in one of the operand locations. Abbreviated XOR. MATHEMATICS A logic operator which has the property that if P is a statement and Q is a statement, then P exclusive or Q is true if either but not both statements are true, false if both are true or both are false. |