lightyear

/L AY1 T Y IH1 R/

noun

1
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.
2
(only in plural) A very long way.
“The marathon runner in the lead is light years ahead of the one at the back.”
3
(only in plural) A very long time.
“Some of Leonardo da Vinci’s inventions were light years ahead of their time.”

Translate “lightyear” into another language

Choose a language below to open the translator with English selected as the source language.