zero gravity: Meaning and Definition of

ze'ro grav'ity

Pronunciation: (zēr'ō-jē'). [key]
— Physics. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.