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Showing results for operation. Search instead for operatio.
Definitions

operation

[op-uh-rey-shuhn] / ˌɒp əˈreɪ ʃən /
NOUN
movement, working
Synonyms
STRONGEST
action activity affair agency application deal effort enterprise exercise force movement procedure process service transaction trip use work
STRONG
act ballgame bit conveyance course deed effect employment engagement exercising exertion exploitation handiwork happening influence instrumentality labor manipulation motion performance play proceeding progress progression scene transference undertaking workmanship
WEAK
carrying-on doing
Antonyms
STRONGEST
cessation idleness inaction inactivity indolence inertia laziness passivity stoppage
STRONG
repose rest
WEAK
inutility uselessness
NOUN
business concern
Synonyms
STRONGEST
affair deal enterprise transaction
STRONG
proceeding undertaking
Antonyms
WEAK
idleness inaction inutility uselessness
NOUN
surgical procedure
Synonyms
STRONGEST
surgery
STRONG
biopsy excision
Antonyms
WEAK
idleness inaction inutility uselessness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

During operation, it used just 5% of the energy needed by conventional approaches.

From Science Daily • Apr. 5, 2026

President Trump confirmed the operation early Sunday and announced a press conference for Monday at 1 p.m.

From The Wall Street Journal • Apr. 5, 2026

Iran’s military claimed credit for downing additional U.S. aircraft as the operation unfolded, including two Black Hawk helicopters and two C-130 military transport planes.

From Los Angeles Times • Apr. 5, 2026

The exact circumstances remain unclear, but the operation to extract him from the ground in hostile territory was hugely complex.

From BBC • Apr. 5, 2026

As long as the bullet wasn't causing problems, they didn't want to create new complications by performing a dangerous operation.

From "Ambushed!" by Gail Jarrow

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.