/ Dictionary / Index L labile: Meaning and Definition of Find definitions for: la•bile Pronunciation: (lā'bul, -bīl), [key] — adj. apt or likely to change. (of a compound) capable of changing state or becoming inactive when subjected to heat or radiation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: labile (Thesaurus) Labiche labilize Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language