Definition of "labile"

labile

/ˈleɪbaɪl/

adjective
comparative more labile, superlative most labile
1. Liable to slip, err, fall, or apostatize.
2. Apt or likely to change.
  Quotations
  Pythagoras [said] that each thing or matter was ever gliding and labile.
  1603, Michel de Montaigne, chapter 12, in John Florio, transl., The Essayes […], book II, London: […] Val[entine] Simmes for Edward Blount […]
3. (chemistry, of a compound or bond) Kinetically unstable; rapidly cleaved (and possibly reformed).
4. (linguistics, of a verb) Able to change valency without changing its form; especially, able to be used both transitively and intransitively without changing its form.