/ Dictionary / Index S stackup: Meaning and Definition of Find definitions for: stack•up Pronunciation: (stak'up"), [key] — n. Aviation. stack (def. 13). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stack table stacte Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language