(1):

(prep.) Of or pertaining to a vicar, substitute, or deputy; deputed; delegated; as, vicarious power or authority.

(2):

(prep.) Acting of suffering for another; as, a vicarious agent or officer.

(3):

(prep.) Performed of suffered in the place of another; substituted; as, a vicarious sacrifice; vicarious punishment.

(4):

(prep.) Acting as a substitute; - said of abnormal action which replaces a suppressed normal function; as, vicarious hemorrhage replacing menstruation.