noun
- a device that produces heat to warm a room, building, or water
- a gun or pistol
Usage: slang
Examples
- The space heater kept the small room warm all winter.
- We need to replace the water heater in the basement.
- Turn on the car heater; it’s freezing outside.
- The electric heater uses too much energy.
- Our old gas heater finally broke down.
- The portable heater is perfect for the garage.