Definition of superluminal in English:

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superluminal

Pronunciation: /ˌsuːpəˈluːmɪn(ə)l/

adjective

Physics
Denoting or having a speed greater than that of light.
Example sentences
  • No engine is likely to generate superluminal speeds; the laws of physics prevent us from doing that, but we will be able to go many times faster than our current propulsion methods allow.
  • And since neither astronaut can affect this superluminal point of light, it seems to me the best that they can do is to use it as a coordination signal, no different than if they both had a watch.
  • For there is nor the slightest shred of evidence for random superluminal wave function collapse or quantum potentials.

Origin

1950s: from super- 'above' + Latin lumen, lumin- 'a light' + -al.

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