light-year

/ˈlaɪtjir/
/ˈlaɪtjɪə/
IPA guide

Other forms: light-years

Definitions of light-year
  1. noun
    the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
    synonyms: light year
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    type of:
    astronomy unit
    a linear unit used for astronomical distances
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