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 definition: 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.

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

Operation can refer to medical surgery, a military campaign, or mathematical methods, such as multiplication and division. Operation comes from the Latin word opus (“work”) and can refer to …

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

Jun 14, 2025 · operation (countable and uncountable, plural operations) (uncountable) The method by which a device performs its function. It is dangerous to look at the beam of a laser …

In mathematics, an operation is a function from a set to itself. For example, an operation on real numbers will take in real numbers and return a real number. An operation can take zero or …

noun The state of being at work; active exercise of some specific function or office; systematic action: as, the machine is in operation. noun Method of working; action.

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.