/ Dictionary / Index L Leiden: Meaning and Definition of Find definitions for: Lei•den Pronunciation: (līd'n), [key] — n. a city in W Netherlands. 103,246. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: leiden (Thesaurus) Leichou Leidy Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language