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Definition of planetary

planetary

/ˈplæn.əˌtɛr.i/
plan · e · tar · y
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planetary Lexical Profile

planetary Game Scores & Validity

• adjective

1

Relating to, resembling, or characteristic of a planet or planets.

Example

"The space probe sent back high-resolution images of the planetary rings around Saturn."

2

Relating to or affecting the entire Earth; global.

Example

"Addressing climate change requires coordinated action on a planetary scale."

3

Designating a mechanical gear system (epicyclic gearing) in which one or more outer gears revolve around a central gear.

Example

"Automatic transmissions rely on a complex planetary gearset to change ratios smoothly."

Synonyms
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Antonyms
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• Rhymes for planetary

• Nearby Words

planeside
planet
planetarium
planetary
planetlike
planetwide
plank

Word Origin & Etymology

Borrowed in the late 16th century from Late Latin planetarius ('relating to the planets'), derived from Ancient Greek planetes ('wanderer'), as ancient astronomers observed planets moving relative to the fixed stars.

Cite this Entry

Wordmom. (2026). Definition of Planetary. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/planetary
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