Definition of 'great white heron'
- a common egret of the genus Egretta found in America; it is a variety of the Old World white egret Casmerodius albus
Synonyms: American egret Egretta albus
- widely distributed Old World white egret
Synonyms: Casmerodius albus
- large white heron of Florida and the Florida Keys
Synonyms: Ardea occidentalis