zero gravity

American  

Also zero-g,

noun

Physics.

1. the condition in which the apparent effect of gravity is zero, as in the case of a body in free fall or in orbit.

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zero gravity British  

noun

1. the state or condition of weightlessness

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zero gravity Scientific  

1. The condition of real or apparent weightlessness occurring when any gravitational forces acting on a body meet with no resistance so the body is allowed to accelerate freely. Bodies in free fall (including trajectories like orbits) experience zero gravity; bodies at rest on the Earth's surface do not, since they are subject to the counterforce of the surface supporting them.

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Etymology

Origin of zero gravity

First recorded in 1950–55

Example Sentences

"It's really fun to be floating around" in zero gravity, he added.

From Barron's • Apr. 3, 2026

This device continuously rotates cells to mimic the disorienting effects of zero gravity.

From Science Daily • Mar. 29, 2026

The performer sang “What a Wonderful World” while in zero gravity, kissed the ground upon landing and said the launch made her feel “super connected to love.”

From Los Angeles Times • Apr. 30, 2025

Blue Origin says its New Shepard passengers are trained over two days with a focus on physical fitness, emergency protocols, details about the safety measures and procedures for zero gravity.

From BBC • Apr. 14, 2025

Everyone floats, some upside down, like they’re all in zero gravity or something.

From "Amari and the Night Brothers" by B.B. Alston