/ Dictionary / Index L lethal chamber: Meaning and Definition of Find definitions for: le'thal cham"ber Pronunciation: [key] a room or enclosure where animals may be killed by exposure to a poison gas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lethal lethal gene Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language