(usu + in) to give (property, power, a title, etc) into the possession or discretion of another, esp to give to a person an immediate and legally fixed right to a present or future enjoyment of (an estate, etc)
(usu + with) to give (somebody) a particular authority, right, or property
to robe (somebody) in ecclesiastical vestments
literary to clothe (somebody) with or as if with a garment
(usu + in) to become granted or legally vested
literary to robe in ecclesiastical vestments
vested adj
[Middle English vesten from early French vestir to clothe, invest, from Latin vestire to clothe, from vestis clothing, garment]