From Longman Dictionary of Contemporary Englishbusiness suitˈbusiness ˌsuit noun [countable] American English DCCa suit that someone wears during the day at work
Examples from the Corpus
business suit• He wore a business suit which lacked the elegance of his chief, Howard.• George, tall, handsome, in a well-cut business suit, is staring adoringly into her eyes.• He wore a charcoal-grey business suit, with a pristine white shirt and maroon silk tie.• He hadn't even got a coat or overall to cover his business suit.• The business suit and bedroom suite are nearly obsolete. 