/ Dictionary / Index L lyceum: Meaning and Definition of Find definitions for: ly•ce•um Pronunciation: (lī-sē'um), [key] — n. an institution for popular education providing discussions, lectures, concerts, etc. a building for such activities. (cap.) the gymnasium where Aristotle taught, in ancient Athens. a lycée. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lyceum (Thesaurus) lycée lych Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language