Jupiter

American  

[joo-pi-ter] / ˈdʒu pɪ tər /

noun

1. Also called Jove. the supreme deity of the ancient Romans: the god of the heavens and of weather.

2. Astronomy. the planet fifth in order from the sun, having an equatorial diameter of 88,729 miles (142,796 km), a mean distance from the sun of 483.6 million miles (778.3 million km), a period of revolution of 11.86 years, and at least 14 moons. It is the largest planet in the solar system.

3. Military. a medium-range U.S. ballistic missile of the 1950s, powered by a single liquid-fueled rocket engine.

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Jupiter ¹ British  

/ ˈdʒuːpɪtə /

noun

1. Greek counterpart: Zeus. (in Roman tradition) the king and ruler of the Olympian gods

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Jupiter ² British  

/ ˈdʒuːpɪtə /

noun

1. the largest of the planets and the fifth from the sun. It has 67 satellites and is surrounded by a transient planar ring system consisting of dust particles. Mean distance from sun: 778 million km; period of revolution around sun: 11.86 years; period of axial rotation: 9.83 hours; diameter and mass: 11.2 and 317.9 times that of earth respectively See Galilean satellite

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Jupiter Scientific  

/ jo̅o̅′pĭ-tər /

1. The fifth planet from the Sun and the largest, with a diameter about 11 times that of Earth. Jupiter is a gas giant made up mostly of hydrogen and helium. It turns on its axis faster than any other planet in the solar system, taking less than ten hours to complete one rotation; this rapid rotation draws its atmospheric clouds into distinct belts parallel to its equator. Jupiter has more known moons by far than any other planet in the solar system—as many as 63, with new ones being discovered regularly in recent years—and it has a faint ring system that was unknown until 1979, when the Voyager space probe investigated the planet. A persistent anticyclonic storm known as the Great Red Spot is Jupiter's most prominent feature.

2. See Table at solar system

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Jupiter ¹ Cultural  

1. In astronomy, the largest planet in the solar system; the fifth major planet from the sun. Jupiter is largely composed of gas es. It is named after the ruler of the Roman gods (see under “Mythology and Folklore”). Jupiter is visible from Earth.

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Jupiter ² Cultural  

1. The Roman name of Zeus, the most powerful of the gods of classical mythology.

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Discover More

The fifth and largest planet from the sun (the Earth is third) is named Jupiter.

Compare meaning

How does jupiter compare to similar and commonly confused words? Explore the most common comparisons:

• Jupiter vs. Zeus

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Example Sentences

See Examples For:

Jupiter

He currently resides in a $60 million Jupiter Island waterfront estate.

From MarketWatch ● Nov. 11, 2026

On November 15 and 16, Mars and Jupiter will create an eye-catching pairing in the southeastern sky.

From Science Daily ● Nov. 6, 2026

Planetary conjunctions occur periodically, but a conjunction between Jupiter — the night sky’s third-brightest natural object after the moon and Venus — and Mars only happens once every few years, according to Betts.

From Los Angeles Times ● Nov. 5, 2026

Look for a bright white Jupiter near a red-orange Mars between 4 and 6 a.m.,

From Los Angeles Times ● Nov. 5, 2026

The umpire pointed the second Jupiter player back to the bench.

From "The Missing Mitt (The Hardy Boys: Secret Files, #2)" by Franklin W. Dixon

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