Corona Australis Syllabification: (Co·ro·na Aus·tra·lis)Pronunciation: /kəˈrōnə ôˈstrāləs, äˈstrā-/ AstronomyDefinition of Corona Australis a small southern constellation (the Southern Crown), with no bright stars. (as genitive Coronae Australis /kəˈrōnē, -ˌnī/) used with a preceding letter or numeral to designate a star in this constellation:the star Theta Coronae AustralisOrigin:LatinCorona Australis in other Oxford dictionaries Definition of Corona Australis in the British & World English dictionary