used or engaged in performing operations: an operating surgeon.
2.
of, for, or pertaining to operations: an operating budget.
3.
of or pertaining to the proper operation of a machine, appliance, etc.: a manual of operating instructions.
4.
Railroads.of, pertaining, or belonging to railroad workers, as engineers or firemen, who are directly engaged in the mechanical operation of trains: an operating union.
to work, perform, or function, as a machine does: This engine does not operate properly.
2.
to work or use a machine, apparatus, or the like.
3.
to act effectively; produce an effect; exert force or influence (often followed by on or upon ): Their propaganda is beginning to operate on the minds of the people.
to give orders and accomplish military acts, as distinguished from doing staff work.
8.
to carry on transactions in securities, or some commodity, especially speculatively or on a large scale.
9.
Informal.to use devious means for one's own gain; insinuate oneself; finagle: a man who knows how to operate with the ladies.
verb (used with object)
10.
to manage or use (a machine, device, etc.): to operate a switchboard.
11.
to put or keep (a factory, industrial system, ranch, etc.) working or in operation: to operate a coal mine.
12.
to bring about, effect, or produce, as by action or the exertion of force or influence.
Origin: 1600–10; < Late Latinoperātus, past participle of operārī, -āre to work, be efficacious, effect, produce, Latin: to busy oneself, verbal derivative of opera effort, work, akin to opus work; see -ate1
Related forms
op·er·at·a·ble, adjective
pre·op·er·ate, verb (used without object), pre·op·er·at·ed, pre·op·er·at·ing.
re·op·er·ate, verb (used with object), re·op·er·at·ed, re·op·er·at·ing.
c.1600, "to be in effect," from L. operari "to work, labor" (in L.L. "to have effect, be active, cause"); see operation. Surgical sense is first attested 1799. Meaning "to work machinery" is from 1864 in Amer.Eng. Operating system in the computer sense is from 1961.