turn in
phrasal verbturn in
- to face the centre or move towards the centre in a curve
- Her feet turn in.
- (old-fashioned) to go to bed
- It’s late—I think I’ll turn in.
turn somebody in
- (informal) to take somebody to the police or somebody in authority because they have committed a crime
- She threatened to turn him in to the police.
- He decided to turn himself in.
turn something in
- to give back something that you no longer need
- You must turn in your pass when you leave the building.
- (especially North American English) to give something to somebody in authority
- They turned in a petition with 80 000 signatures.
- I haven't even turned in Monday's work yet.
- to achieve a score, performance, profit, etc.
- The champion turned in a superb performance to retain her title.