firebird noun4 •A magical and prophetic glowing or burning bird from a faraway land, which is both a blessing and a harbinger of doom to its captor •A scarlet tanager (Piranga olivacea). (This species is now classified as belonging to the cardinal family: Cardinalidae) •A Baltimore oriole (Icterus galbula). •A vermilion flycatcher (Pyrocephalus rubinus). formsfirebirds