turn in


  1. to submit something; to give
    He turned in his paperwork to the main office.
  2. to relinquish; give up; to tell on someone to the authorities (especially to turn someone in)
    The thief finally turned himself in at the police station.
    He turned his brother-in-law in for seeing him assault a customer.
    My nosey next door neighbor turned me in for building my garage without a permit.
  3. to go to sleep; retire to bed
    I'm tired, so I think I'll turn in early tonight.
  4. To convert a goal using a turning motion of the body.

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