Used informally to refer to an influential person, often with a hint of humor or irony. I had to dress up to meet the bigwigs of the company.
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Context Clues
The word is often used with qualifiers specifying the context, like 'political' or 'industry', to clarify the sphere of influence. She's a bigwig in the fashion world.
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Not Literally Big
'Bigwig' is metaphorical and doesn't refer to the person's physical size, but to their status or influence. Despite his small stature, he's a real bigwig in basketball.