English Dictionary |
LIGHT HOUR
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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
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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