light-year

L l

Definitions of light-year word

noun light-year Astronomy. the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km): used as a unit in measuring stellar distances. Abbreviation: lt-yr. 1
noun light-year light-years. a very great distance, especially in development or progress: The new computer is light-years ahead of the old one. a very long time: It's been light-years since I've seen my childhood friends. 1
noun light-year Alternative spelling of light year. 0

before 1885

One of the 21% newest English words

First recorded in 1885-90

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This term is known only to a narrow circle of people with rare knowledge. Only 29% of English native speakers know the meaning of this word.

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