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Meaning of antigravity

an•ti•grav•i•ty

Pronunciation: (an"tē-grav'i-tē, an"tī-), [key]
— n.
  1. the antithesis of gravity; a hypothetical force by which a body of positive mass would repel a body of negative mass.
  2. (not in technical use) a controllable force that can be made to act against the force of gravity.
—adj.
  1. (not in technical use) counteracting the force of gravity: The antigravity drive in this spaceship will enable us to reach Polaris.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.