[v] go to bed in order to sleep; "I usually turn in at midnight"; "He turns out at the crack of dawn"
[v] carry out, as of performances: "They turned in a splendid effort"; "They turned in top jobs for the second straight game"
[v] make an entrance by turning from a road; "Turn in after you see the gate"
[v] to surrender someone or something to another; "the guard delivered the criminal to the police"; "render up the prisoners"; "render the town to the enemy"
crawl in, deliver, get in, get into bed, go to bed, go to sleep, hand over, hit the hay, hit the sack, kip down, put on, render, retire, sack out