an act or instance, process, or manner of functioning or operating.
the state of being operative (usually preceded by in or into): a rule no longer in operation.
the power to act; efficacy, influence, or force.
the exertion of force, power, or influence; agency: the operation of alcohol on the mind.
a process of a practical or mechanical nature in some form of work or production: a delicate operation in watchmaking.
a course or procedure of productive or industrial activity: building operations.
a particular process or course: mental operations.
a business transaction, especially one of a speculative nature; deal: a shady operation.
a business, especially one run on a large scale: a multinational operation.
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.
a mathematical process, as addition, multiplication, or differentiation.
the action of applying a mathematical process to a quantity or quantities.
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.
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.
- mis·op·er·a·tion, noun
- pre·op·er·a·tion, noun
- re·op·er·a·tion, noun
- sub·op·er·a·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for operation
the act, process, or manner of operating
the state of being in effect, in action, or operative (esp in the phrases in or into operation)
a process, method, or series of acts, esp of a practical or mechanical nature
surgery any manipulation of the body or one of its organs or parts to repair damage, arrest the progress of a disease, remove foreign matter, etc
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
a commercial or financial transaction
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for operation
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.