What is the meaning of light hour?

noun

  • The distance light travels in a vacuum in one hour; approximately one billion kilometers. .
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). light hour. Retrieved September 22, 2026, from http://smartdefine.org/light_hour/definitions/1325476
ChicagoWordNet. 2010. "light hour" http://smartdefine.org/light_hour/definitions/1325476 (accessed September 22, 2026).
HarvardWordNet 2010, light hour, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/light_hour/definitions/1325476>.
MLAWordNet. "light hour" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/light_hour/definitions/1325476>