| Noun | 1. | radiator - any object that radiates energy | |
| 2. | radiator - heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildingsheater, warmer - device that heats water or supplies warmth to a room | |
| 3. | radiator - a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fanmechanism - device consisting of a piece of machinery; has moving parts that perform some function radiator cap - cap on the opening in the top of a radiator through which a coolant liquid can be added | |