Definition of dwarf. plural. dwarfs. play \ˈdwȯrfs\ also. dwarves. play \ˈdwȯrvz\. 1a : a person of unusually small stature (see stature 1); especially : a person whose height does not exceed 4' 10 and is typically less than 4' 5b : an insignificant person a literary dwarf. 2 : an animal or plant much below normal size.