phrasal verb. If you hand in something such as homework or something that you have found, you give it to a teacher, police officer, or other person in authority.

What is the meaning of hand in hand in English?

1 : with hands clasped (as in intimacy or affection) walking hand in hand. 2 : in close association : together The chef works hand in hand with a nutritionist.

What is the meaning of go hand in hand in idioms?

if two things go hand in hand, they are closely connected and cannot be considered separately from each other. The principle of the playgroup movement is that play and learning go hand in hand: your child masters new skills and absorbs knowledge while having fun. Easy Learning Idioms Dictionary.