- a mathematical process, as addition, multiplication, or differentiation.
- the action of applying a mathematical process to a quantity or quantities.
- a campaign, mission, maneuver, or action.
- Usually operations.the conduct of a campaign, mission, etc.
- 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.
- operations,the people who work at such a headquarters.
- operating microscope,
- operating room,
- operating system,
- operating table,
- operating theatre,
- operation barbarossa,
- operation desert storm,
- operation overlord,
- operation sealion,
Origin of operation
- a military or naval action, such as a campaign, manoeuvre, etc
- (capital and prenominal when part of a name)Operation Crossbow
- any procedure, such as addition, multiplication, involution, or differentiation, in which one or more numbers or quantities are operated upon according to specific rules
- a function from a set onto itself
late 14c., "action, performance, work," also "the performance of some science or art," from Old French operacion "operation, working, proceedings," from Latin operationem (nominative operatio) "a working, operation," from past participle stem of operari "to work, labor" (in Late Latin "to have effect, be active, cause"), from opera "work, effort," related to opus (genitive operis) "a work" (see opus). The surgical sense is first attested 1590s. Military sense of "series of movements and acts" is from 1749.