antigravity

[ an-tee-grav-i-tee, an-tahy- ]
/ ˌæn tiˈgræv ɪ ti, ˌæn taɪ- /

noun

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.

adjective

(not in technical use) counteracting the force of gravity: The antigravity drive in this spaceship will enable us to reach Polaris.

Origin of antigravity

First recorded in 1940–45; anti- + gravity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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