Polite form of 友達, used mainly by children or when speaking to children, and in polite adult conversation.
I made a new friend at kindergarten.
child (one does not know); another child; other children
Used by parents or guardians to refer to a child they don't know, or to other children in general, often in a gentle or polite tone.
I'm going out to play with my friend.
Some other child threw sand at him at the park.
Play nicely with the other children.