Definitions
1.adjectiveLiable to slip, err, fall, or apostatize.
2.adjectiveApt or likely to change.
3.adjective(of a compound or bond) Kinetically unstable; rapidly cleaved (and possibly reformed)."Certain drugs can be conjugated to polymer molecules with a linkage that is labile at low pH to effect controlled release in a cellular endosome."
4.adjective(of a verb) Able to change valency without changing its form; especially, able to be used both transitively and intransitively without changing its form.