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.

(by extension) A garment or set of garments suitable and/or required for a given task or activity: space suit, boiler suit, protective suit, swimsuit.

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

A full set of armour.

(law) The attempt to gain an end by legal process; a process instituted in a court of law for the recovery of a right or claim; a lawsuit.

Petition, request, entreaty.

Pursuit of a love-interest; wooing, courtship.

The full set of sails required for a ship.

(card games) Each of the sets of a pack of cards distinguished by color and/or specific emblems, such as the spades, hearts, diamonds, or clubs of traditional Anglo, Hispanic, and French playing cards.

(transitive) To make proper or suitable; to adapt or fit.

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

(transitive) To be appropriate or apt for.

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

To please; to make content; to fit one's taste.

(intransitive) To agree; to be fitted; to correspond (usually followed by to, archaically also followed by with)