What is the meaning of the title of Fruits Basket?
The Fruits Basket is a game where a player is assigned to one fruit (any fruit as long as it is a fruit). Tohru was assigned by her friends to be the onigiri (rice ball, which obviously isn't a fruit), so she was left sitting alone because onigiri won't be called since onigiri isn't a fruit. It is also a metaphor on how Tohru can't belong to the Souma family as an onigiri won't belong to a Fruits Basket. Reference here.