LIGHT HOUR

Pronunciation (US):

(GB):

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 kilometers

  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)