Ar•go(är′gō),USA pronunciationn.,[gen.]Ar•gus(är′gəs)USA pronunciation for 1.
Astronomya very large southern constellation, now divided into Vela, Carina, Puppis, and Pyxis, four separate constellations lying largely south of Canis Major.
Mythology(italics) [Class. Myth.]the ship in which Jason sailed in quest of the Golden Fleece.