English Explanatory Dictionary

light year

English dictionary entry

Meanings

noun
  1. A unit of length used to measure extremely large distances, equal to approximately 9.46 trillion kilometres 10 trillion kilometres (10¹⁶ metres), equivalent to the distance light travels in one Julian year.
  2. A very long way.
  3. A very long time.

Pronunciation

/ˈlaɪt.jɪə/ /ˈlaɪt.jɪɹ/ /ˈläːt.jøː/ /ˈlaɪt.jɜː/ LL-Q1860 (eng)-Vininn126-light year.wav

Word forms

light year light years ly lightyear light-year

Related words

light aeon light century light day light decade light eon light hour light millennium light minute light month light second lightspeed light week astronomical unit parsec

Derived words

ly kilolightyear kly megalightyear Mly gigalightyear Gly
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