Capella Syllabification: (Ca·pel·la)Pronunciation: /kəˈpelə/ AstronomyDefinition of Capella the sixth brightest star in the sky, and the brightest in the constellation Auriga. It is a yellow giant. Origin:Latin, 'she-goat', diminutive of caper 'goat'Capella in other Oxford dictionaries Definition of Capella in the British & World English dictionary