The Collaborative International Dictionary
Vested \Vest"ed\, a.
Clothed; robed; wearing vestments. ``The vested priest.''
--Milton.-
(Law) Not in a state of contingency or suspension; fixed; as, vested rights; vested interests.
Vested legacy (Law), a legacy the right to which commences in pr[ae]senti, and does not depend on a contingency; as, a legacy to one to be paid when he attains to twenty-one years of age is a vested legacy, and if the legatee dies before the testator, his representative shall receive it.
--Blackstone.Vested remainder (Law), an estate settled, to remain to a determined person, after the particular estate is spent.
--Blackstone.
--Kent.
Wiktionary
n. (context legal English) A future interest in an estate in land which is certain to vest at some future point.