Jupiter

noun

Ju·​pi·​ter ˈjü-pə-tər 

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

Examples of Jupiter in a Sentence

Recent Examples on the Web

For the first half of the 20th century, Jupiter was known to have an even dozen. —Phil Plait, Scientific American, 21 Mar. 2025

Now high in the southern sky after dark, as seen from the Northern hemisphere, Jupiter is in the constellation Taurus, and Mars is in Gemini. —Jamie Carter, Forbes, 21 Mar. 2025

Lucy will fly past the three-mile-wide (five-kilometer-wide) asteroid on April 20, but the trip mostly serves as a rehearsal for other asteroid encounters down the road — namely, Lucy's final destination: Jupiter's Trojan asteroids. —Julian Dossett, Space.com, 21 Mar. 2025

July 28: SpaceX Falcon Heavy from KSC’s Launch Complex 39-A that launched a telecom satellite for Hughes Network Systems called the Jupiter 3 EchoStar XXIV at 11:04 p.m. —Richard Tribou, Orlando Sentinel, 18 Mar. 2025

Word History

Etymology

Latin

First Known Use

13th century, in the meaning defined at sense 1

Kids Definition

Jupiter

noun

Ju·​pi·​ter ˈjü-pət-ər 

: the largest of the planets and fifth in order of distance from the sun see planet

Geographical Definition

Jupiter

geographical name

Ju·​pi·​ter ˈjü-pə-tər 

town on the Atlantic in southeastern Florida population 55,156