1. To give or yield someone or something. A noun or pronoun can be used between "hand" and "over." I still have a hard time handing the baby over to the nanny when I leave for work in the morning. When you retire, you'll have to hand over all of your responsibilities to someone else, you know.

2. To deliver someone into someone else's authority or jurisdiction. A noun or pronoun can be used between "hand" and "over." We can't harbor a criminal—we need to hand him over to the authorities.