<p><strong>Noun</strong></p><ul><li>an act or instance, process, or manner of functioning or operating</li><li>the state of being operative (usually preceded by in or into): a rule no longer in operation</li><li>the power to act; efficacy, influence, or force</li><li>the exertion of force, power, or influence; agency: the operation of alcohol on the mind</li><li>a process of a practical or mechanical nature in some form of work or production: a delicate operation in watchmaking</li><li>a course or procedure of productive or industrial activity: building operations</li><li>a particular process or course: mental operations</li><li>a business transaction, especially one of a speculative nature; deal: a shady operation</li><li>a business, especially one run on a large scale: a multinational operation</li><li>Surgery: a procedure aimed at restoring or improving the health of a patient, as by correcting a malformation, removing diseased parts, implanting new parts, etc.</li><li>Mathematics: a mathematical process, as addition, multiplication, or differentiation</li><li>the action of applying a mathematical process to a quantity or quantities</li><li>Computers: any discrete activity or action that is performed by a computer, as reading, writing, processing, sending, or receiving data: The http request operation has timed out</li><li>Military: a campaign, mission, maneuver, or action</li><li>Usually operations: the conduct of a campaign, mission, etc.</li><li>operations, a headquarters, office, or place from which a military campaign, air traffic to and from an airfield, or any of various other activities is planned, conducted, and controlled</li><li>operations, the people who work at such a headquarters</li></ul>