operation

[op-uh-rey-shuhn]

noun

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

2. the state of being operative (usually preceded by in orinto ).

   a rule no longer in operation.

3. the power to act; efficacy, influence, or force.

4. the exertion of force, power, or influence; agency.

   the operation of alcohol on the mind.

5. a process of a practical or mechanical nature in some form of work or production.

   a delicate operation in watchmaking.

6. a course or procedure of productive or industrial activity.

   building operations.

7. a particular process or course.

   mental operations.

8. a business transaction, especially one of a speculative nature; deal.

   a shady operation.

9. a business, especially one run on a large scale.

   a multinational operation.

10. Surgery.,  a procedure aimed at restoring or improving the health of a patient, as by correcting a malformation, removing diseased parts, implanting new parts, etc.

11. Mathematics.

    1. a mathematical process, as addition, multiplication, or differentiation.

    2. the action of applying a mathematical process to a quantity or quantities.

12. Computers.,  any discrete activity or action that is performed by a computer, as reading, writing, processing, sending, or receiving data.

    The http request operation has timed out.

13. Military.

    1. a campaign, mission, maneuver, or action.

    2. Usually operations the conduct of a campaign, mission, etc.

    3. operations, a headquarters, office, or place from which a military campaign, air traffic to and from an airfield, or any of various other activities, is planned, conducted, and controlled.

    4. operations, the people who work at such a headquarters.

operation

/ ˌɒpəˈreɪʃən /

noun

1. the act, process, or manner of operating

2. the state of being in effect, in action, or operative (esp in the phrases in or into operation )

3. a process, method, or series of acts, esp of a practical or mechanical nature

4. surgery any manipulation of the body or one of its organs or parts to repair damage, arrest the progress of a disease, remove foreign matter, etc

5. 1. a military or naval action, such as a campaign, manoeuvre, etc

   2. ( capital and prenominal when part of a name )

      Operation Crossbow

6. maths

   1. any procedure, such as addition, multiplication, involution, or differentiation, in which one or more numbers or quantities are operated upon according to specific rules

   2. a function from a set onto itself

7. a commercial or financial transaction

operation

1. Medicine,  A surgical procedure for remedying an injury, ailment, defect, or dysfunction.

2. Mathematics,  A process or action, such as addition, substitution, transposition, or differentiation, performed in a specified sequence and in accordance with specific rules.

3. A logical operation.

4. Computer Science,  An action resulting from a single instruction.

Other Word Forms

• misoperation noun
• preoperation noun
• reoperation noun
• suboperation noun

Word History and Origins

Origin of operation¹

First recorded in 1350–1400; Middle English operacioun, oparacion, operation, from Latin operātiōn- (stem of operātiō ), equivalent to operāt(us) + -iōn- noun suffix of action or condition; operate

Example Sentences

At the same time, use of the Fed’s standing repo facility — seen as a liquidity spigot for financial institutions in search of short-term cash to finance their operations — increased in late October.

Read more on MarketWatch

Mr Haybourne says his team regularly carries out operations at the Port of Dover, to search for stolen cars, caravans, quad bikes, farm vehicles, diggers and other agricultural machinery.

Read more on BBC

They play a crucial role in fields ranging from pharmaceuticals and batteries to petrochemical operations such as crude oil refining, enabling production systems to meet global demand.

Read more on Science Daily

The object is the planned 2031 destination for Japan's Hayabusa2 extended mission, and the updated measurements provide essential details for planning spacecraft operations only six years before the encounter.

Read more on Science Daily

Some accused Mayor Karen Bass of reducing fire department operations amid a budget crunch.

Read more on Los Angeles Times

Related Words

• action 
• activity 
• affair 
• agency 
• application 
• deal 
• effort 
• enterprise 
• exercise 
• force 
• movement 
• procedure 
• process 
• service 
• transaction 
• trip 
• use 
• work