Suit is a term with various meanings:

• A lawsuit, an action brought before a court, as to recover a right or redress a grievance
• Suit (clothing), a combination of formal clothing, such as a jacket and matching trousers
• Environmental suit, a piece of clothing used for a particular activity or in a particular environment; for example a space suit or diving suit
• Jumpsuit, catsuit, wetsuit, or swimsuit, a one-piece outfit.
• Suit (cards), one of four categories into which a deck of cards is divided.
• Slang for a professional, The Establishment, management or government employee, because they wear the aforementioned formal suit
• Suit (album), the name of one of rapper Nelly's 2004 albums
• Suits (album), the third album by Fish
• Suit (comic), a fictional character in the Marvel universe, appearing first in the Venom series
• Suits (film), a 1999 film starring Robert Klein, Tony Hendra, Larry Pine, Paul Lazar and Randy Pearlstein