Jovian UK /ˈd͡ʒəʊ.vi.ən/US /ˈd͡ʒoʊ.vi.ən/adjective 2noun 1forms 3 adjective2 •Pertaining to the planet Jupiter.Saturn and Uranus fit that pattern, although Saturn did reveal winds three times as fast as Jupiter's and convective storms, one of which (left, bottom) is as large as a Jovian white oval. — 1990 •Pertaining to the Roman god Jove or Jupiter (the counterpart of the Greek god Zeus); Jove-like; befitting Jupiter. noun1 •An imaginary inhabitant of the planet Jupiter. formsJovians · more Jovian · most Jovian