/an'tee grav"i tee, an'tuy-/ , n.
1. Physics. 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.
3. (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 ]