/ Dictionary / Index S sidelock: Meaning and Definition of Find definitions for: side•lock Pronunciation: (sīd'lok"), [key] — n. earlock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sideling sidelong 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