zero gravity

WordReference Random House Unabridged Dictionary of American English © 2026

ze′ro grav′ity, [Physics.]

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

Also, ze•ro-g, ze•ro-G  (zēr′ō jē′). 

• 1950–55

Collins Concise English Dictionary © HarperCollins Publishers::

zero gravity, zero-G noun

1. the state or condition of weightlessness