AntliaPronunciation: /ˈantlɪə/ AstronomyDefinition of Antlia a small and faint southern constellation (the Air Pump), between Hydra and Vela. (as genitive Antliae /ˈantlɪʌɪ, -lɪiː/) used with preceding letter or numeral to designate a star in this constellation:the star Alpha AntliaeOrigin:Latin, from GreekAntlia in other Oxford dictionaries Definition of Antlia in the US English dictionary