business suit

US /ˈbɪz.nɪs ˌsuːt/
UK /ˈbɪz.nɪs ˌsuːt/
"business suit" picture
1.

a set of matching clothes consisting of a jacket and trousers or a skirt, worn for formal or professional occasions

:
He wore a sharp business suit to the interview.
Many professionals are required to wear a business suit daily.