Tux (noun)

1. A man's formal evening suit, typically black, with a black bow tie and a black satin or grosgrain lapel.
2. A man's formal evening dress, typically black and including a black bow tie and a black satin or grosgrain lapel.

Origin:

Short for tuxedo, a formal type of evening wear for men, named after tuxedo park, new york, where it was first worn in the late 19th century.

Examples:

1. He wore a tux to the wedding.
2. The groom was dressed in a tux.
3. The tux was a classic and timeless look.
4. The tux was the traditional attire for formal occasions.
5. The tux was rented from a formal wear shop.