operate

verb

operated; operating

intransitive verb

1
: to perform a function : exert power or influence
factors operating against our success
2
: to produce an appropriate effect
the drug operated quickly
3
a
: to perform an operation or a series of operations
The refinery is planning to begin operating as soon as possible.
b
: to perform surgery
The surgeon has been operating all morning.
c
: to carry on a military or naval action or mission
The army will operate in conjunction with the air force.
4
: to follow a course of conduct that is often irregular
crooked gamblers operating in the club

transitive verb

1
2
a
: to cause to function : work
operate an automobile
b
: to put or keep in operation
operated a grocery store
3
: to perform an operation on
especially : to perform surgery
usually used with on
operate on a patient
operating on a brain tumor

Examples of operate in a Sentence

They hope to have the windmill operating again tomorrow. The camera also operates underwater. The machine can operate at high speeds. instructions for operating the new microwave oven
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Vienna owns and operates about 220,000 apartment units. Ryan Kellman, NPR, 15 June 2025 An oil refinery was damaged in the northern Israeli city of Haifa, according to the firm operating it, which said no one was wounded. Jon Gambrell, Chicago Tribune, 15 June 2025 Meta Might Repeat Facebook Failures Meta, then operating as Facebook, already attempted to launch of a native stablecoin in 2019 via the Libra project which was subsequently rebranded as Diem. Sean Stein Smith, Forbes.com, 15 June 2025 Global Guardian carries out security assessments for Fortune 1000 clients operating in dangerous regions and conducts evacuations from hot spots worldwide. Brady Knox, The Washington Examiner, 15 June 2025 See All Example Sentences for operate

Word History

Etymology

borrowed from Late Latin operātus, past participle of operārī "to work, be efficacious, effect, produce," going back to Latin, "to busy oneself, be at work," probably back-formation from operātus "busy, engaged, occupied with religious observances," from opera "activity, effort" + -ātus -ate entry 3 — more at opera entry 2

First Known Use

1588, in the meaning defined at intransitive sense 1

Time Traveler
The first known use of operate was in 1588

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Cite this Entry

“Operate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/operate. Accessed 27 Jun. 2025.

Kids Definition

operated; operating
1
: to work or cause to work in a proper way
how to operate the new microwave oven
2
: to take effect
a drug that operates quickly
3
: manage sense 1
operate a business
4
a
: to perform an operation or a series of operations
b
: to perform surgery
operate on a patient
Etymology

from Latin operatus, past participle of operari "to work" — related to maneuver see Word History at maneuver

Medical Definition

operated; operating

intransitive verb

: to perform surgery

transitive verb

: to perform surgery on
operated the growth

More from Merriam-Webster on operate

Last Updated: - Updated example sentences
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