1. off-gas - Noun
2. off-gas - Verb
off-gas (countable and uncountable, plural off-gases)
(manufacturing) Gas produced as a side effect of a chemical reaction, sometimes hazardous.
off-gas (third-person singular simple present off-gasses, present participle off-gassing, simple past and past participle off-gassed)
(of a solid or liquid) To emit gases, especially noxious ones.