Meaning: If you hand something in, you give it to someone in authority, like a teacher, a policeman or a security guard.Synonym: turn in (American), submit (formal)
- hand in sth Please hand in your exam paper before you leave the classroom.
- hand sth in If you find something that doesn't belong to you, please hand it in to the duty officer at the front desk.
hand in: exam paper, test paper, report, results, keys, security card
When you've finished the assignment, please hand in