radiator meaning and definition

RADIATOR noun

Definition of radiator (noun)

1. any object that radiates energy
2. heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings
3. 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 fan