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

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.

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

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

There are 18 meanings listed in OED's entry for the noun operation, four of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Oct 9, 2025 · operation (countable and uncountable, plural operations) (uncountable) The method by which a device performs its function.

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 …

Procedure is used especially in medical English, for example by doctors and people who work in hospitals.

Find 546 different ways to say OPERATION, along with antonyms, related words, and example sentences at Thesaurus.com.

An operation must not be confounded with the process by which the operation is effected. Thus, there is but one operation of extracting the cube root of a number, but there are several …