turn in

verb

1. 1

   prepare for sleep

   I usually turn in at midnight

   He goes to bed at the crack of dawn

2. 2

   carry out (performances)

   They turned in a splendid effort

   They turned in top jobs for the second straight game

3. 3

   make an entrance by turning from a road

   Turn in after you see the gate

4. 4

   to surrender someone or something to another

   the guard delivered the criminal to the police

   render up the prisoners