/ Dictionary / Index M mushroom anchor: Meaning and Definition of Find definitions for: mush'room an"chor Pronunciation: [key] a stockless anchor having a bowlike head, used chiefly for semipermanent moorings. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mushroom mushroom cloud Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language