Definition of Light Second in English :
Define Light Second in English
Light Second meaning in English
Meaning of Light Second in English
Pronunciation of Light Second in English
Light Second pronunciation in English
Pronounce Light Second in English
Light Second
see synonyms of light secondNoun
1. light second
the distance light travels in a vacuum in one second; approximately 300,000 kilometers
WordNet Lexical Database for English. Princeton University. 2010.