Faster-than-light; having a speed greater than light.(adjective)
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Use "superluminal" in a sentence
"The term superluminal is unfortunate, and to be honest I cringe a bit when ever I hear the word."
"Monitoring of this star by both amateurs and professionals for signs of a high velocity or 'superluminal'-expanding nebulalight-echo would seem to be in order."
"This model, called the superluminal model of pulsars, was described by Singleton and colleague Andrea Schmidt as solving many unanswered issues about pulsars."