term:

Vest

vest vb

[Anglo-French vestir, literally, to clothe, from Old French, from Latin vestire]
vt
1 a : to place in the possession, discretion, or province of some person or authority [all legislative powers herein granted shall be ed in a Congress of the United States "U.S. Constitution art. I"] [a timely notice of appeal s jurisdiction in the appeals court]
;specif
: to give to a person a fixed and immediate right of present or future enjoyment of (as an estate) [an interest ed in the beneficiary]
b : to grant or endow with a particular authority, right, or property [ a judge with discretion]
vi
: to become vested
;specif
: to entitle one unconditionally to the payment of pension benefits upon termination or retirement [his pension interest will after ten years with the company] compare mature

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.