The meaning of OPERATION is performance of a practical work or of something involving the practical application of principles or processes. How to use operation in a sentence.

OPERATION meaning: 1. the fact of operating or being active: 2. the way that parts of a machine or system work…. Learn more.

1. an act or instance, process, or manner of functioning or operating.

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.

Dec 17, 2025 · operation (countable and uncountable, plural operations) (uncountable) The method by which a device performs its function.

Military operation ... A military operation (op) is the coordinated military actions of a state, or a non-state actor, in response to a developing situation. These actions are designed as a military plan to resolve …

OPERATION definition: an act or instance, process, or manner of functioning or operating. See examples of operation used in a sentence.

• He began to write down the questions he needed answered in order to put his plan into operation. • The engine is started on petrol, with just enough suction to bring the gasifier into operation. • We put …

OPERATION meaning: 1 : a process in which a doctor cuts into someone's body in order to repair or remove a damaged or diseased part; 2 : a usually small business or organization

Definition of operation noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.