spoonbill /ˈspunˌbɪl/ noun2 •Any of various large, long-legged wading birds of the genus Platalea, in the ibis family Threskiornithidae, that have a large, flat, spatulate bill. •(US) A species of fish, Polyodon spathula, native to the river basins of Mississippi, Ohio, and Missouri, or its extinct close relatives. formsspoonbills