/ Dictionary / Index D death cup: Meaning and Definition of Find definitions for: death' cup" Pronunciation: [key] a poisonous mushroom of the genus Amanita. the part of this mushroom that persists around the base of the stalk as a membranous cup. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. death chamber deathday Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language