/ Dictionary / Index L Le Châtelier principle: Meaning and Definition of Find definitions for: Le Châ'te•lier prin"ciple Pronunciation: (lu shät'l-yā"), [key] — Physics. Physics. the law that if a constraint is applied to a system in equilibrium, the system adjusts to a new equilibrium that tends to counteract the constraint. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lechatelierite lechayim* Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language