Definition of guy:
- A rope attached to anything to steady it.
- A person grotesquely got up, like an effigy of Guy Fawkes on Gunpowder Plot day.
- In a ship, a rope used to keep a heavy body steady while hoisting or lowering; a wire rope, chain, or rod to steady and prevent undulations in a suspension bridge.
- A grotesque effigy of Guy Fawkes; a person dressed in an odd or fantastic manner.