What is the meaning of turn in?

verb

• Make an entrance by turning from a road.
  • usage: "Turn in after you see the gate"
• To surrender someone or something to another.
  • usage: "the guard delivered the criminal to the police"; "render up the prisoners"; "render the town to the enemy"; "fork over the money"
  • synonyms: hand over, fork over, fork out, fork up, deliver, render
• Carry out (performances. )
  • usage: "They turned in a splendid effort"; "They turned in top jobs for the second straight game"
  • synonyms: put on
• Prepare for sleep.
  • usage: "I usually turn in at midnight"; "He goes to bed at the crack of dawn"
  • synonyms: go to bed, bed, crawl in, kip down, hit the hay, hit the sack, sack out, go to sleep, retire