noun A person's action of submitting something, such as an assignment or a document
verb To submit or hand in something, typically a completed task or assignment
Soldiers are required to turn in their weapons at the end of their service.
Users are prompted to turn in their old devices for recycling.
Students are required to turn in their assignments by the due date.
Witnesses are expected to turn in any evidence they have to the court.
Guests are asked to turn in their room keys upon check-out.
Employees must turn in their reports at the end of the week.
In the publishing industry, writers are often required to turn in their completed manuscripts by a specific deadline to meet publication schedules.
Psychologists may need to turn in progress reports or treatment plans to insurance companies for reimbursement purposes.
Teachers must turn in grades at the end of each semester to the school administration for record-keeping.
Software developers may need to turn in their code for review by a senior developer before it can be merged into the main codebase.
Accountants are responsible for turning in financial reports to clients or regulatory authorities to ensure compliance with accounting standards.