n. 要人, 大亨

[ noun ]
the most important person in a group or undertaking
<noun.person>

Bigwig \Big"wig`\, n. [Big,a.+ wig.]
A person of consequence; as, the bigwigs of society. [Jocose]

In our youth we have heard him spoken of by the bigwigs
with extreme condescension. --Dickens.