interplanetary

[ in-ter-plan-i-ter-ee ]

/ ˌɪn tərˈplæn ɪˌtɛr i /

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adjective

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

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of interplanetary

First recorded in 1685–95; inter- + planetary

Words nearby interplanetary

interpersonal, interpersonal theory, interpersonal therapy, interphase, interphone, interplanetary, interplanetary space, interplant, interplay, interplead, interpleader

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use interplanetary in a sentence

Other origins of life researchers, however, doubt that the challenges to life arising on Earth are grave enough to resort to interplanetary travel.
Your ancestors might have been Martians|Charlie Wood|February 12, 2021|Popular-Science
The spacecraft’s payload — which includes a heat flow instrument, a magnetometer and a seismometer — makes it the first fully equipped interplanetary geophysicist.
Rumbles on Mars Raise Hopes of Underground Magma Flows|Robin George Andrews|February 1, 2021|Quanta Magazine
Today SpaceX used its eighth prototype, SN8, to conduct the vehicle’s first high altitude flight test, an essential step toward making Musk’s dreams of interplanetary transportation a reality.
SpaceX’s Starship flies, belly flops, and bursts into flames|Charlie Wood|December 10, 2020|Popular-Science
Fortunately for future explorers, the technology to link the far flung reaches of the solar system—an interplanetary internet—has been in the works for decades.
The moon will soon have cell service|Charlie Wood|October 22, 2020|Popular-Science

The interplanetary internet is an infrastructure that’s intended to support interplanetary activity, which could be research but someday could also be commercialization.
To Boldly Go Where No Internet Protocol Has Gone Before|Susan D'Agostino|October 21, 2020|Quanta Magazine
The plan is to mine asteroids to be used on Earth and for interplanetary travel.
James Cameron and Investors Seek to Lasso and Mine an Asteroid|Vivien Marx|April 24, 2012|DAILY BEAST
But a vast amount of it will be spent in interplanetary doldrums, waiting to arrive at the destination.
How Space Agencies Are Preparing for a Mission to Mars|Josh Dzieza|February 12, 2011|DAILY BEAST
But when pressed, she offered that a more interplanetary story line might serve the president well.
Great Writers Rescue Obama|Samuel P. Jacobs|December 14, 2010|DAILY BEAST
Interplanetary commerce, if and when it begins, will be fraught with all of the dangers that accompany pioneering expeditions.
Spacewrecked on Venus|Neil R. Jones
Coming alongside the crushed hull of the interplanetary liner, we made an inspection of its position.
Spacewrecked on Venus|Neil R. Jones
"They've been collecting here ever since the first interplanetary rocket-ships went forth," Crain reminded him.
The Sargasso of Space|Edmond Hamilton
And here we have reached the goal of our interplanetary journey.
Astronomy for Amateurs|Camille Flammarion
Everybody was interested in, or affected by, interplanetary travel, now.
The Planet Strappers|Raymond Zinke Gallun

British Dictionary definitions for interplanetary

interplanetary

/ (ˌɪntəˈplænɪtərɪ, -trɪ) /

adjective

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