A "dinner jacket" is a fancy, formal type of coat that men wear for special occasions, usually in the evening. It's also commonly known as a "tuxedo." Full definition
With dinner jackets & three piece suits to velvet and floral blazers, our contemporary styles are suited to every spring / summer occasion. (au.boohoo.com)
Why not turn in the heavy dinner jackets for something a little more versatile? (jjsuspenders.com)
Dress for a black - tie event in a black dinner jacket paired with a crisp white button - down shirt. (myntra.com)