Pronunciation: /ˈɒpəreɪtə/
noun
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1 [often with modifier] a person who operates equipment or a machine: a radio operator
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a person who works at the switchboard of a telephone exchange: calls are made through the operator
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2 [usually with modifier] a person or company that runs a business: a tour operator
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3 [with adjective] informal a person who acts in a shrewd or manipulative way: her reputation as a cool, clever operator
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4 Mathematics a symbol or function denoting an operation (e.g. ×, +).