zero gravity

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noun 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.

Nearby words

  1. zermelo's axiom,
  2. zernike,
  3. zero,
  4. zero balancing,
  5. zero defects,
  6. zero grazing,
  7. zero hour,
  8. zero in,
  9. zero in on,
  10. zero option

Also ze·ro-g, ze·ro-G [zeer-oh-jee] /ˈzɪər oʊˈdʒi/.

Origin of zero gravity

First recorded in 1950–55

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for zero gravity

zero gravity

noun

the state or condition of weightlessness
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

Science definitions for zero gravity

zero gravity

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.