light year


Definition: Meaning of, light year in English to English dictionary.

Pronunciation: / lʌɪt jɪə;jəː /

  • noun
  • synonym
  • antonym
Word Forms:
Singular Plural
light year light years
[countable]
  1. the distance that light travels in one year, about 9,460,000,000,000 kilometres, used for measuring distances between stars
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  2. light years ahead/better etc than something informal much more advanced, much better etc than someone or something else
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  3. light years ago informal a very long time ago
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