WordWeb Online

1. Make an entrance by turning from a road
   "Turn in after you see the gate"
    
2. To surrender someone or something to another
   "turn in the money";
   - hand over, fork over, fork out, fork up, deliver, render
    
3. Carry out (performances)
   "They turned in a splendid effort"; "They turned in top jobs for the second straight game";
   - put on
    
4. Prepare for sleep
   "I usually turn in at midnight";
   - go to bed, bed, crawl in, kip down, hit the hay, hit the sack, sack out, go to sleep, retire

Derived forms: turns in, turning in, turned in

Type of: come in, create, enter, get in, get into, give, go in, go into, hand, make, move into, pass, pass on, reach, turn over

Antonym: turn out