big business noun [ U ] (BUSINESS)
› powerful and influential businesses and financial organizations (= ones with a lot of influence) when considered as a group:
Thesaurus: synonyms and related words
(Definition of “big business” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
(Definition of “big business” from the Cambridge Academic Content Dictionary © Cambridge University Press)
(Definition of “big business” from the Cambridge Business English Dictionary © Cambridge University Press)
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