ibisbillPronunciation: /ˈʌɪbɪsbɪl/Definition of ibisbill noun an upland wading bird of central Asia, with a long downcurved bill and black, white, and blue-grey plumage on the head and breast. Ibidorhyncha struthersii, the only member of the family Ibidorhynchidae ibisbill in other Oxford dictionaries Definition of ibisbill in the US English dictionary