noun
1. : white-bellied swallow
2. : an Australian and Polynesian swallow ( Hirundo nigricans ) that nest in holes in trees — called also tree martin
noun
1. : white-bellied swallow
2. : an Australian and Polynesian swallow ( Hirundo nigricans ) that nest in holes in trees — called also tree martin
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012