(n) A unit of size (acronym ly; corresponding to just below 10 trillion kilometres (1016 metres)) corresponding to the length light travels in a single Julian 12 months; familiar with measure exceptionally large distances.
(n) A very long way.
(n) A very long time.
Light Year in Astronomy Dictionary
the length light travels in a-year, on price of 300,000 kilometers per 2nd (671 million miles hourly); 1 light-year is the same as 9.46053e12 kilometer, 5,880,000,000,000 kilometers or 63,240 AU. by Hilde ColemanReport definition
Light Year in Community Dictionary
1 Light Year = 9324744613632kmOne light-year is defined by going for 365 times within continual rate of light, that will be 299 792 458 m/s in which:m = length in metress = time in moments by Reyna RymerReport definition
1. The length light journeys in a single 12 months, or roughly 5.88 trillion miles. 2. A figure of speech meaning extremely higher level. by SaulReport definition