suh rə giht [or] suh rə geIt
noun
1. one that acts in another’s place, esp. in an official capacity; substitute.
2. a judge, in some states in the United States, who presides over the settlement of wills and estates
adjective
acting as, or considered to be, a substitute or replacement.
His aunt acted as a surrogate parent while his mother was spending time in jail.
transitive verb (suh rə geIt)
to appoint as a substitute, replacement, or deputy.