noun

• A device that produces and radiates heat, typically to raise the temperature of a room or building.
• A person who heats something, for example in metalworking.
• (dated, slang) A gun.
• (baseball, slang) A fastball, especially one thrown at high velocity.
• (gambling, slang) An extended winning streak.
• (historical) A medieval European shield having a rounded triangle shape like a clothes iron.
• (horse racing) A dead heat; a race in which two or more competitors reach the finish line simultaneously.
• A surname.