(third-person singular simple present turns in, present participle turning in, simple past and past participle turned in)
- (idiomatic) to submit something; to give
- He turned in his paperwork to the main office.
- (idiomatic) 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.
- (intransitive, idiomatic) to go to sleep; retire to bed
- I'm tired, so I think I'll turn in early tonight.
- (soccer) To convert a goal using a turning motion of the body.
- in turn, in-turn