microgravity

noun

mi·​cro·​grav·​i·​ty ˌmī-krə-ˈgra-və-tē How to pronounce microgravity (audio)
: a condition in space in which only minuscule forces are experienced : virtual absence of gravity
broadly : a condition of weightlessness

Examples of microgravity in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Polk said the astronaut is stable but that diagnostic uncertainty in microgravity prompted NASA to err on the side of bringing the crew member back to Earth. Greg Wehner, FOXNews.com, 9 Jan. 2026 Conditions such as space adaptation syndrome — an ailment characterized by vomiting and vertigo that is experienced by many astronauts during their first hours in microgravity — only came into focus after years of research and revelations in academic journals. Jackie Wattles, CNN Money, 8 Jan. 2026 However, there has been plenty of research into the effects of microgravity on the human body. Victor Tangermann, Futurism, 8 Jan. 2026 In the microgravity of orbit, atoms line up with a precision that borders on the impossible. Mrigakshi Dixit, Interesting Engineering, 31 Dec. 2025 See All Example Sentences for microgravity

Word History

First Known Use

1974, in the meaning defined above

Time Traveler
The first known use of microgravity was in 1974

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Cite this Entry

“Microgravity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microgravity. Accessed 11 Jan. 2026.

Kids Definition

microgravity

noun
mi·​cro·​grav·​i·​ty ˌmī-krə-ˈgrav-ət-ē How to pronounce microgravity (audio)
: the condition of being weightless or of the near absence of gravity

More from Merriam-Webster on microgravity

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