attire, garb, dress - clothing of a distinctive style or for a particular occasion; "formal attire"; "battle dress"

balldress - a suit or dress for formal occasions

dinner dress, dinner gown, evening gown, tea gown - a formal gown for evening wear

black tie, dinner jacket, tux, tuxedo - semiformal evening dress for men

dress suit, full dress, tail coat, tailcoat, tails, white tie and tails, white tie - formalwear consisting of full evening dress for men