Definition of "radiator" in English

noun

1. Anything which radiates or emits rays.

2. (automotive, mechanical) A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.

   • The car overheated because of a broken radiator.

3. (of buildings) A finned metal fixture that carries hot water or steam in order to heat a room.

   • The radiator kept the apartment warm during winter.
   • Steam hissed from the old iron radiator.

4. (electronics) A type of antenna.