- noun a theoretical gravitational force in which mass repels rather than attracts other mass and radiation
- A postulated gravitational force in which mass repels rather than attracts other mass and radiation Although never observed, antigravity has a role in modern physics and cosmology, where whole ‘antigravity universes’ are postulated. On a smaller scale, some astronomical objects including Kerr black holes seem able to drive light away from them instead of sucking it in as most black holes must, an example of antigravity in action. Unfortunately these examples provide little assistance to would-be mountaineers who might provide a ready market for portable antigravity equipment.
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