tux ‧ e ‧ do /tʌkˈsiːdəʊ $ -doʊ/ BrE AmE ( also tux /tʌks/ informal ) noun ( plural tuxedos ) [countable]
[ Date: 1800-1900 ; Origin: Tuxedo Park, town in New York State ]
1 . a man’s ↑ jacket that is usually black, worn on formal occasions
2 . a man’s suit that includes this type of ↑ jacket