/ Dictionary / Index E ex lib.: Meaning and Definition of Find definitions for: ex lib. Pronunciation: [key] ex libris. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ex lege* ex libris Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language