Is “Hotbox” a Scrabble word?

1. 1.A container maintained at elevated temperatures in order to heat or cook its contents.

2. 2.An overheated shaft bearing.

1. 1.To smoke marijuana in a small confined area, such as the inside of a car, until it is full of smoke, thereby purportedly intensifying the drug's effects.

2. 2.To put out a cigarette just before entering a vehicle, then expel smoke in the vehicle.

Synonyms: box out, clambake