(1):

(n.) One who wears a livery, as a servant.

(2):

(n.) A freeman of the city, in London, who, having paid certain fees, is entitled to wear the distinguishing dress or livery of the company to which he belongs, and also to enjoy certain other privileges, as the right of voting in an election for the lord mayor, sheriffs, chamberlain, etc.

(3):

(n.) One who keeps a livery stable.