gumball /ɡʌmbɔl/ noun4 •Chewing gum sold as a ball usually coated with colored hard sugar.Remember those clear globe dispensers with gumballs for a penny? •The spiky seedpod of the sweet gum tree. •(US, slang) The flashing lights on top of a police car. •(slang) A silly, laughable person.When he drinks too much he's a gumball. formsgumballs