(programming) An operator taking three operands, specifically the operator ?: used in many programming languages to select one of two values depending on a third value.

plural of operagoer

Someone who attends an opera performance

plural of operad

(slang, computing) A rogue system administrator who abuses users of the system.

(Canada) An illegal marijuana-growing operation, usually indoors.

plural of grow operation

Alternative form of operations research

Pertaining to soap opera.

(arithmetic) Any of the four basic operators in arithmetic, namely addition, subtraction, multiplication and division.