A process or series of acts involved in a particular form of work: the operation of building a house.
An instance or method of efficient, productive activity: That restaurant is quite an operation.
An unethical or illegal business: a fencing operation for stolen goods.
Medicine A surgical procedure for remedying an injury, ailment, defect, or dysfunction.
Mathematics A process or action, such as addition, substitution, transposition, or differentiation, performed in a specified sequence and in accordance with specific rules.
A logical operation.
Computer Science An action resulting from a single instruction.
A military or naval action, campaign, or mission.
The headquarters or center from which a military action, flights into and out of an airfield, or other activities are controlled.
The division of an organization that carries out the major planning and operating functions.