Definition of surrogating:
(n) :
A substitute (usually of a person, position or role).
(n) :
A person or animal that acts as a substitute for the social or pastoral role of another, such as a surrogate parent.
(adj) :
Of, concerning, relating to or acting as a substitute.
(v) :
(transitive) To replace or substitute something with something else; to appoint a successor.
(n) :
(US law) A judicial officer of limited jurisdiction, who administers matters of probate and intestate succession and, in some cases, adoptions.
(n) :
(US, politics) A politician or person of influence campaigning for a presidential candidate.