1. World Wildlife Fund, World Wide Fund for Nature, an international conservation organization focused on wilderness preservation and reducing human impact on the environment
   "The WWF leads efforts to protect endangered species and their habitats"
    
2. World Wrestling Federation, former name (1979-2002) of World Wrestling Entertainment (WWE), a professional wrestling promotion company
   "He was a champion in the WWF during the 1980s wrestling boom"

Encyclopedia: WWF