What does "vested" mean?

Vested: (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 præsenti, 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.