the mind > possession > relinquishing > relinquish or give up [verb (transitive)] > hand over to another > hand in (3)
transitive. To hand in, to deliver (an account, return, etc.) to the person officially appointed to receive it. to give in one's adhesion to: to…
transitive. To bring or carry in by hand; to give in; spec. to submit something to a person in authority for his or her attention.
To hand in, return, or cash in (a form of currency). Chiefly figurative (colloquial) in to pass in one's cheques (U.S. checks), to pass in one's chips…