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Dinner jacket

noun

Noun

1
A jacket, often white, corresponding to a tuxedo jacket. US, especially
"Constant was fully dressed in blue-green evening shorts and a dinner jacket of gold brocade."
2
semiformal evening dress for men wordnet
3
The formal suit, typically black, that includes this type of jacket. British
"[They] sat in a pen in the corner, smoking cigarettes and reading magazines; four or five girls in black silk dresses and the same number of slight effeminate young men in dinner-jackets."

So called because it is worn by men to formal dinners.

Unscramble this word: dinnerjacket