(1):

(n.) One who is retained or kept in service; an attendant; an adherent; a hanger-on.

(2):

(n.) A fee paid to engage a lawyer or counselor to maintain a cause, or to prevent his being employed by the opposing party in the case; - called also retaining fee.

(3):

(n.) The act of a client by which he engages a lawyer or counselor to manage his cause.

(4):

(n.) The act of withholding what one has in his hands by virtue of some right.

(5):

(n.) One who, or that which, retains.

(6):

(n.) Hence, a servant, not a domestic, but occasionally attending and wearing his master's livery.

(7):

(n.) The act of keeping dependents, or the state of being in dependence.