The phrasal verb "hand back" primarily exists in informal to semi-formal contexts, with less common usage in formal writing. It often means to return something to someone, typically after it has been borrowed or examined. In educational settings, teachers "hand back" graded papers or assignments to students. In a more general setting, one might "hand back" a borrowed book or tool. The verb is straightforward and typically not idiomatic, meaning its usage is almost always literal. As a result, it is a functional expression found in day-to-day conversations, especially where items are exchanged or need to be returned to their rightful owner.
B1
PreIntermediate
1. To return something to someone.
After finishing the book, she handed back the novel to her friend.
The teacher handed back the graded assignments to the students.
2. To return something to its original place or condition.
Please hand back the tools to the toolbox once you're done using them.
Make sure to hand back the keys to the reception before you leave the hotel.