• suit [countable]
• 1

  clothes

  a set of clothes made of the same material, usually including a jacket with trousers or a skirt:
• a grey light-weight suit
• a business suit
• a tweed suit
• She was wearing a black trouser suit.
• ➔ morning suit
• 2

   bathing/jogging etc suit

  a piece of clothing or a set of clothes used for swimming, running etc ➔ boiler suit, shell suit, sweat suit,tracksuit, wet suit
• 3

  law

  a problem or complaint that a person or company brings to a court of law to be settled [= lawsuit]:
• Johnson has filed suit against her.
• a civil suit
• 4

  office worker

  informal a man, especially a manager, who works in an office and who has to wear a suit when he is at work:
• I bought myself a mobile phone and joined the other suits on the train to the City.
• 5

  cards

  one of the four types of cards in a set of playing cards
• 6

   somebody's strong suit

  something that you are good at:
• Sympathy is not Jack's strong suit.

• ➔ in your birthday suit

   at birthday (3)

   ➔ follow suit

   atfollow (14)

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.