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

Zero gravity has given her a style that would take a lot of product to achieve on Earth.

From BBC • Mar. 17, 2025

Zero gravity also changes the shape of the eye, harming some astronauts’ vision for reasons that are not fully understood—and in some cases, the changes appear to be permanent.

From Slate • Jun. 6, 2013