Light year

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• Light year — Light year, Light year Light year (Astron.) 1. The distance over which light can travel in a year s time in a vacuum, 5.88 trillion miles (9.46 trillion kilometers); used as a unit in expressing stellar distances. It is more than 63,000 times as… …   The Collaborative International Dictionary of English

• Light-year — Light year, Light year Light year (Astron.) 1. The distance over which light can travel in a year s time in a vacuum, 5.88 trillion miles (9.46 trillion kilometers); used as a unit in expressing stellar distances. It is more than 63,000 times as… …   The Collaborative International Dictionary of English

• light year — also light year, lightyear, distance light travels in one year, 1888, from LIGHT (Cf. light) (n.) + YEAR (Cf. year) …   Etymology dictionary

• light year — n 1.) the distance that light travels in one year, about 9,460,000,000,000 kilometres, used for measuring distances between stars ▪ a star 3,000 light years from earth 2.) light years ahead/better etc than sth informal much more advanced, much… …   Dictionary of contemporary English

• light year — light years 1) N COUNT A light year is the distance that light travels in a year. ...a star system millions of light years away. 2) N COUNT: usu pl, N prep/adv (emphasis) You can say that two things are light years apart to emphasize a very great …   English dictionary

• light year — light ,year noun 1. ) count the distance that light travels in a year, used as a unit for measuring distances in space 2. ) light years plural INFORMAL a very long way in time, distance, or quality: Her life in Hollywood was light years away from …   Usage of the words and phrases in modern English

• Light-year — For other uses, see Light year (disambiguation). Image showing the scale of a light year (outer shell) and a light month (inner shell) surrounding the Sun compared to Comet 1910 A1 s orbit (yellow line) and Comet Hyakutake s orbit (orange line).… …   Wikipedia

• light-year — /luyt year , year /, n. 1. Astron. 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. Abbr.: lt yr 2. light years, a. a very great distance, esp. in… …   Universalium

• light-year — noun An alternative spelling of light year …   Wiktionary

• Light year (disambiguation) — Light year may refer to: *Light Years, Alternative, Neo Grunge, Experimental rock band from Long Island, NY. * Light year, a unit of length, the distance light travels in a vacuum in one year * Lightyear (band), a ska punk band from the United… …   Wikipedia

• light-year — noun Date: 1888 1. a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers) 2. an extremely large measure of comparison (as of distance, time, or… …   New Collegiate Dictionary