AraPronunciation: /ˈɑːrə/ AstronomyDefinition of Ara a small and faint southern constellation (the Altar), in the Milky Way near Scorpius. (as genitive Arae /ˈɑːrʌɪ, ˈɑːriː/) used with preceding letter or numeral to designate a star in this constellation:the star Delta AraeOrigin:LatinAra in other Oxford dictionaries Definition of Ara in the US English dictionary