light year
/ˈlaɪt.jɪə//ˈlaɪt.jɪr/
释义
名词noun
- 1(astronomy) 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.
- 2chiefly in the plural, informal, figurativeA very long way.
- 3chiefly in the plural, informal, figurativeA very long time.