suitsuit1 /sut/ ●●● noun 1 [countable] a set of clothes made of the same material, including a jacket with pants or a skirt: a dark gray business suit2[countable] a piece of clothing or set of clothes used for a special purpose: a bathing suit3[countable, uncountable] law a lawsuit: A homeowner filed suit against the county and lost.4[countable] one of the four types of cards in a set of playing cards