/ Dictionary / Index L lay-by: Meaning and Definition of Find definitions for: lay-by Pronunciation: (lā'bī"), [key] — n. (on a road or railroad) a place beside the main road or track where vehicles may wait. a mooring place in a narrow river or canal, formed to one side so as to leave the channel free. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lay-by (Thesaurus) lay brother lay clerk Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language