/ Dictionary / Index S sidecheck: Meaning and Definition of Find definitions for: side•check Pronunciation: (sīd'chek"), [key] a checkrein passing from the bit to the saddle of a harness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. side chair side circuit Related Content Daily Word Quiz: boorish Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language