/ Dictionary / Index S square set: Meaning and Definition of Find definitions for: square' set' Pronunciation: [key] — Mining. Mining. a set having 12 timbers joined to form eight 90° solid angles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. square serif square shake Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language