| Definitions | | light year |
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noun
- (astronomy) A unit of length (abbreviation ly) equal to the distance light travels in one year; used to measure extremely large distances.
- (in plural light years; figurative, informal) A very long way.
- The marathon runner in the lead is light years ahead of the one at the back.
- (in plural light years; figurative, informal, nonstandard) A very long time.
- Some of Leonardo da Vinci's inventions were light years ahead of their time.
Translations: - Dutch: lichtjaar (1)
- French: année-lumière (1)
- German: Lichtjahr (1)
- Italian: anno luce (1)
- Spanish: aí±o luz
Etymology: light + year
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