hand-in, hand something in

Kihachi confides in Otsune, who scolds him for keeping his worries to himself. He leaves the boys in Otsune's care and sets off for the police station to hand himself in.^[1]

hand something in

Give something to a person in authority for their attention:we handed in a letter of protest

hand-in

Pronunciation: /ˈhandɪn/ 

Real Tennis , Rackets , and Squash

NOUN

The person who is serving the ball.

Origin

Late 19th century; earliest use found in ‘Stonehenge’ (1810–1888) (real name John Walsh). From hand + in.