Original: A tuxedo is an ensembl (or outfit) of clothing which includes a dress shirt, a bow tie, dress pants, a tuxedo suit jacket, dress socks, leather dress shoes, and sometimes a vest.
Simplified: A tuxedo is an ensemble (or outfit) of clothing which includes a dress shirt, a bow tie, dress pants, a tuxedo suit jacket, dress socks, leather dress shoes, and sometimes a vest.