A device that produces and radiates heat, typically to raise the temperature of a room or building.
Turn on the heater; I'm cold.
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A person who heats something, for example in metalworking.
“First you've got to sit up and go into the tackroom, because you are soaking wet. And shivering.” The tackroom was cold, so Sam turned on the kerosene heater and found a wool cooler and wrapped her in it.
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(dated, slang) A gun.
The thug pumped two rounds from his heater into her.
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