mannikinPronunciation: /ˈmanɪkɪn/Definition of mannikin noun 1a small waxbill of the Old World tropics, typically brown, black, and white and often kept as a cage bird. Genus Lonchura, family Estrildidae: many species 2variant spelling of manikin.mannikin in other Oxford dictionaries Definition of mannikin in the US English dictionary