Definitions
1.nounThe grantee of a fief, feud, or fee; one who keeps land of a superior, and who vows fidelity and homage to him, normally a lord of a manor; a feudatory; a feudal tenant.
2.nounA subordinate
3.verbTo treat as a vassal or to reduce to the position of a vassal; to subject to control; to enslave.
4.verbTo subordinate to someone or something.
5.adjectiveResembling a vassal; slavish; servile.