[an-tee-grav-i-tee, an-tahy-]
Physics. the antithesis of gravity; a hypothetical force by which a body of positive mass would repel a body of negative mass.
(not in technical use) a controllable force that can be made to act against the force of gravity.
(not in technical use) counteracting the force of gravity: The antigravity drive in this spaceship will enable us to reach Polaris.

1940–45; anti- + gravity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
While gravity pulled celestial objects inward, this extra gravitational effect-a kind of antigravity-pushed them apart.
So suppose antigravity can also exist on a small, let's say human, scale.
The method stretches the shortened antigravity muscles that are inside a different static muscles chains.
Not long ago, it seemed antigravity research might go mainstream.
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