blacktie
adjectiveUK /ˌblæk ˈtaɪ/
US /ˌblæk ˈtaɪ/
Wearing a fancy suit with a black bow tie for a special event.
The guests wore black-tie outfits to the fancy dinner.
SYNONYMS
RELATED WORDS
OTHER MEANINGS
2. A very formal dress code that requires a tuxedo and black bow tie.
The invitation said black-tie, so he rented a tuxedo.
3. A formal social event where people wear tuxedos and gowns.
They attended a black-tie at the museum.
4. A black bow tie worn with formal evening clothes.
He tied his black-tie carefully before the party.