/ Dictionary / Index T tide lock: Meaning and Definition of Find definitions for: tide' lock" Pronunciation: [key] a lock at the entrance to a tidal basin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tideland tidemark Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language