/ Dictionary / Index S square bracket: Meaning and Definition of Find definitions for: square' brack'et Pronunciation: [key] bracket (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. square and rabbet square centimeter Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language