Englishfor English speakers
operation
Noun
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An operation is a medical process, often opening the human body.
The doctors performed the operation in three hours.
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An operation is an action of a group of people working for a goal (often military).
The Army operation was a success.
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An operation is part or all of a business. small(often plural)/small
The company's East Coast operation was bigger than its West Coast operation.
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An operation is a symbol that is used to perform a specific operation (addition, subtraction, multiplication or division) in maths.
The plus symbol is used to perform a specific operation in maths which is addition.
flash
Noun
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A flash is a sudden bright light.
He used the flash on his camera.
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A flash is a very fast period of time.
The tall man disappeared in a flash.
flash
Verb
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If something flashes, it shines brightly and suddenly.
The fountain flashed in the sunshine.
It rained hard. flashed and we heard thunder.
The light from the car flashed through the window into the house for a second when the car drove past.