LIGHT YEARS meaning: Distance light travels in one year

We found 11 dictionaries that define the word light years:

General (10 matching dictionaries)

light-years: Merriam-Webster
light years: Oxford Learner's Dictionaries
light years: Collins English Dictionary
light-years, light years: Vocabulary.com
light-years: Wordnik
light years: Cambridge Advanced Learner's Dictionary
light-years, light years: Wiktionary
light-years, light years: Dictionary.com
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Light years: TheFreeDictionary.com

Computing (1 matching dictionary)

Light-years, Light years: Encyclopedia

(Note: See light_year as well.)

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Definitions from Wiktionary (light year)

▸ noun:  (astronomy) A unit of length (abbreviation ly; equal to just under 10 trillion kilometres (10¹⁶ metres)) equal to the distance light travels in one Julian year; used to measure extremely large distances.
▸ noun:  (only in the plural, informal, figurative) A very long way.
▸ noun:  (only in the plural, informal, figurative) A very long time.
▸ Also see light_year

Opposite:

dark seconds, short distance, close proximity

Types:

parsec, light-year, astronomical unit, light minute, light hour, more...

Phrases:

light years away, 2000 Light Years from Home, Four Light Years, Three Light Years, more...

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