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opera hat
opera house
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operation

op·er·a·tion [ òppə ráysh'n ]


noun  (plural op·er·a·tions)
Definition:
 
1. control: the act of making something carry out its function, or controlling or managing the way it works

2. functioning state: the state of functioning or of being in effect
The ban is to be put into operation starting next week.

3. something done: something that is carried out, especially something difficult or complex
the tricky operation of removing the sting

4. medicine surgical intervention: any surgical procedure, e.g. one carried out to repair damage to a body part

5. organized action: an organized campaign, maneuver, or other form of action, especially one carried out by rescue personnel, the police, or diplomatic personnel

6. military military action: an action conducted by military forces that can range in scope from a reconnaissance mission to an entire campaign ( often used before a noun )
Operation Desert Storm

7. mathematics mathematical process: a mathematical process in which entities are derived from others through the application of rules, e.g. subtraction, multiplication, or differentiation

8. comput single part of computer program: a series of actions performed by a computer, defined by an instruction and forming part of a computer program

9. business deal: a business deal or financial transaction

10. illegal business: an illegal, dishonest, or underhanded business
He got involved in a shady gambling operation.



plural noun op·er·a·tions 
Definition:
 
controlling of organized activities: the supervising, monitoring, and coordinating of the activities of a military or civilian organization or a complex machine ( often used before a noun )
the operations console of a computer

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