Dictionary

A set of clothes to be worn together, now especially a man's matching jacket and trousers (also business suit or lounge suit), or a similar outfit for a woman.

Example: Nick hired a navy-blue suit for the wedding.

(by extension) A single garment that covers the whole body: space suit, boiler suit, protective suit.

(metonym) A person who wears matching jacket and trousers, especially a boss or a supervisor.

Example: Be sure to keep your nose to the grindstone today; the suits are making a "surprise" visit to this department.

A full set of armour.

To make proper or suitable; to adapt or fit.

(said of clothes, hairstyle or other fashion item) To be suitable or apt for one's image.

Example: That new top suits you. Where did you buy it?

To be appropriate or apt for.

Example: Ill suits his cloth the praise of railing well.

(most commonly used in the passive form) To dress; to clothe.