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English definition of “closed shop”

closed shop

noun [C]    
HR, WORKPLACE a place of work where you have to belong to a particular trade union : Unions wanted to negotiate a closed shop with their employers .
disapproving a type of job , an industry , etc. that is only open to particular people or companies to work in and not to everyone: The US defence market was until recently a closed shop to all but American firms .
(Definition of closed shop noun from the Cambridge Business English Dictionary © Cambridge University Press)
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as husband and wife

in the same way as two people who are married

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