A tuxedo is a formal suit for men, usually black with a jacket and special pants.
Tuxedos are for fancy events like weddings or parties.
Examples:
He wore a tuxedo to the wedding.
The man's tuxedo was very fancy.
The tuxedo is black and white.
I want to wear a tuxedo to the party!
In the movie, the penguin wore a tuxedo.
The tuxedo made him look like a penguin.