Dictionary.com
Thesaurus.com

terraforming

British  
/ ˈtɛrəˌfɔːmɪŋ /

noun

  1. planetary engineering designed to enhance the capacity of an extraterrestrial planetary environment to sustain life

"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 terraforming

C20: from Latin terra earth + forming

Explanation

Terraforming is altering a planet or moon to make it habitable for humans. If you dream of living on Mars one day, you'll be cheering on any scientific advances in terraforming. Astronomer Carl Sagan is credited with the earliest terraforming concept, a 1961 theory about how scientists might change the atmosphere of Venus so that humans could live there safely. The enormous scientific and economic challenges to terraforming any known planets make this, as of now, a hypothetical idea. The word terraforming was coined in 1942 by science fiction writer Jack Williamson, from the Latin terra, "earth," and form, "shape or mold."

Keep Reading on Vocabulary.com

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:

A new workshop summary, however, argues that recent advances mean terraforming should now be treated as a legitimate area of scientific research, even if any real attempt remains far in the future.

From Science Daily Jul. 17, 2026

For nearly two decades, the art form formerly known as television did nothing but grow, in wild and glorious abandon, as if it had been touched by a terraforming agent from “Doctor Who.”

From Los Angeles Times Jan. 11, 2024

"One idea is that CFCs could be useful in terraforming a planet to make it warmer — this idea has been suggested as a way for humans to terraform Mars," Misra said.

From Salon Feb. 28, 2022

The first level of terraforming is at 60 millibars, a factor of 10 from where we are now.

From New York Times Jan. 2, 2022

These and other considerations suggest that a time scale for a significant terraforming of Mars is probably hundreds to thousands of years.

From "Cosmos" by Carl Sagan

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training