English Dictionary

LIGHT HOUR

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IPA (US): 

 Dictionary entry overview: What does light hour mean? 

LIGHT HOUR (noun)
  The noun LIGHT HOUR has 1 sense:

1. the distance light travels in a vacuum in one hour; approximately one billion kilometersplay

  Familiarity information: LIGHT HOUR used as a noun is very rare.


 Dictionary entry details 


LIGHT HOUR (noun)


Sense 1

Meaning:

The distance light travels in a vacuum in one hour; approximately one billion kilometers

Classified under:

Nouns denoting quantities and units of measure

Hypernyms ("light hour" is a kind of...):

astronomy unit (a linear unit used for astronomical distances)

Holonyms ("light hour" is a part of...):

light-year; light year (the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers)


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