appearing to travel faster than the speed of light.
Read more in this article about some frequently asked questions and fun facts related to our definitions.
Origin of superluminal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
physics of or relating to a speed or velocity exceeding the speed of light
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012