From Longman Dictionary of Contemporary Englishgas chamberˈgas ˌchamber noun [countable] SCa large room in which people or animals are killed with poisonous gas
Examples from the Corpus
gas chamber• Like a gas chamber, it overwhelms.• They knew Amelia was too skinny to avoid the gas chamber.• If some one had a wound, or looked too weak or too sick, they were selected for the gas chamber.• Both died in the gas chamber.• In California all three candidates for governor have promised to keep the gas chamber busy.• Ronald Reagan appointee, was on the panel that unanimously upheld the gas chamber ban Wednesday.• Only three other states still use the gas chamber, Laurence said. 