lethal chamber noun 1verb 1forms 3 noun1 •A gas chamber, especially one used for euthanizing animals.When the fourteen years which Nature permits, Are closing in asthma, or tumour, or fits, And the vet's unspoken prescription runs, To lethal chambers or loaded guns — 1909 verb1 •To execute (someone) by means of lethal chamber."They ought to be lethal-chambered, nasty little sewer-rats, one of 'em's saved them the trouble at any rate." — 1913 formslethal chambered · lethal chambering · lethal chambers