a North American bunting, Passerina cyanea, the male of which is indigo.
Origin of indigo bunting
An Americanism dating back to 1775–85
Also called indigo bird, indigo finch.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for indigo bunting
indigo bird or indigo finch
a North American bunting, Passerina cyanea, the male of which is bright blue and the female brown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012