Definition of Jupiter
1
: the chief Roman god, husband of Juno, and god of light, of the sky and weather, and of the state and its welfare and its laws — compare zeus
2
: the largest of the planets and fifth in order from the sun — see Planets Table
Test Your Vocabulary
Challenging Words You Should Know
-
- Often used to describe “the march of time,” what does inexorable mean?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share Jupiter
Time Traveler for Jupiter
The first known use of Jupiter was in the 13th century
See more words from the same century