/ Dictionary / Index S sea stack: Meaning and Definition of Find definitions for: sea' stack" Pronunciation: [key] a pillarlike mass of rock detached by wave action from a cliff-lined shore and surrounded by water. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sea squirt sea star Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language