This one is for all the gentlemen. The Tuxedo is evening formal wear for men, traditionally worn in black. Usually the jacket has a grosgrain lapel and matching seam on the trousers. The outfit is completed with a bow tie and a cummerbund.
The term “tuxedo” is uniquely American. Most of the world refers to the same outfit as a dinner jacket. The term comes from James Potter, who was invited in 1886 to dine with the Prince of Wales, Edward (who later became King Edward VII). Edward was quite debonair, and was known for a keen fashion sense. The manner in which he wore his neck tie, for example, became all the rage and is now known as the Windsor knot — still the proper way to tie a tie.
Potter asked the Price what appropriate dress would be, and Edward sent him to Savile Row tailor Henry Poole & Company. When he returned to the US, Potter continued to wear his outfit to his elite, New York country club, the Tuxedo Park Club. Eventually his jacket style was associated with members of the club and referred to as the Tuxedo Park style, which eventually got shortened to the Tuxedo.
Moral, when you go abroad, it is a dinner jacket, but here in the US use the term Tuxedo.