1. A formal jacket, typically black or dark blue, worn as part of evening attire for men
   "He rented a dinner jacket for the black-tie gala"; "He rented a dinner jacket for the black-tie gala";
   - tux [N. Amer, informal], tuxedo [N. Amer], black tie

Derived forms: dinner jackets

Type of: evening clothes, evening dress, eveningwear, formalwear

Encyclopedia: Dinner jacket