light year

Noun
  1. The distance that light travels in a vacuum in 1 year;
    5.88 trillion miles or 9.46 trillion kilometers (synset 113678138)
    is a type of: astronomy unit - a linear unit used for astronomical distances
    has:
    • light hour - the distance light travels in a vacuum in one hour; approximately one billion kilometers
    • light minute - the distance light travels in a vacuum in one minute; approximately 18 million kilometers
    • light second - the distance light travels in a vacuum in one second; approximately 300,000 kilometers
    same as: light-year

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