- endowed with or characterized by a hearty, joyous humor or a spirit of good-fellowship: a wonderfully jovial host.
- (initial capital letter) of or relating to the god Jove, or Jupiter.
- having or expressing convivial humour; jolly
1580s, “under the influence of the planet Jupiter,” from Middle French jovial (16c.), from Italian joviale, literally “pertaining to Jupiter,” and directly from Latin Iovialis “of Jupiter,” from Iovius (used as genitive of Iuppiter) “Jupiter,” Roman god of the sky (see Jove). The meaning “good-humored, merry,” is from astrological belief that those born under the sign of the planet Jupiter are of such dispositions. Related: Jovially.