Webster's Revised Unabridged Dictionary · 1913

deputy

deputy (dep"u*ty) , noun

[French député, from Late Latin deputatus. See Depute.]

1.
One appointed as the substitute of another, and empowered to act for him, in his name or his behalf; a substitute in office; a lieutenant; a representative; a delegate; a vicegerent; as, the deputy of a prince, of a sheriff, of a township, etc.
There was then [in the days of Jehoshaphat] no king in Edom; a deputy was king. — 1 Kings xxii. 47
God's substitute, His deputy anointed in His sight. — Shakespeare

Deputy is used in combination with the names of various executive officers, to denote an assistant empowered to act in their name; as, deputy collector, deputy marshal, deputy sheriff.

2.
A member of the Chamber of Deputies. [France]
Collocations (1)
Chamber of Deputies , one of the two branches of the French legislative assembly; -- formerly called Corps Législatif. Its members, called deputies, are elected by the people voting in districts.