Meaning of Le Châtelier principle

Le Châ'te•lier prin"ciple

Pronunciation: (lu shät'l-yā"), [key]
— Physics. Physics.
  1. 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.