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interplanetary

American  
[in-ter-plan-i-ter-ee] / ˌɪn tərˈplæn ɪˌtɛr i /

adjective

  1. being or occurring between the planets or between a planet and the sun.


interplanetary British  
/ ˌɪntəˈplænɪtərɪ, -trɪ /

adjective

  1. of, relating to, or existing between planets

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of interplanetary

First recorded in 1685–95; inter- + planetary

Vocabulary lists containing interplanetary

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

From about 4.56 billion to 3.5 billion years ago, meteorites, micrometeorites and interplanetary dust particles from asteroids and comets repeatedly struck Earth.

From Science Daily Jul. 19, 2026

In order to efficiently scale its satellite launches, orbital data centers and interplanetary travel ambitions, SpaceX needs to develop a fully reusable spacecraft.

From MarketWatch Jun. 6, 2026

"But Nandini's sari is the first object I have collected from India for our interplanetary science collection and it's our very first sari," Shindell says.

From BBC Jun. 5, 2026

Meanwhile, an interplanetary space race between the U.S.,

From The Wall Street Journal Mar. 30, 2026

What I thought about then was the space twin, the one who went on an interplanetary journey and returned in a week to find his brother ten years older.

From "Cat's Eye" by Margaret Atwood

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