année-lumière

French

année-lumière f (plural années-lumière)

light year (astronomical distance)
L’année-lumière s’utilise surtout en vulgarisation pour exprimer les distances interstellaires et intergalactiques, car cette unité est facilement accessible par le grand public en raison de sa définition, la distance parcourue par la lumière pendant le temps cité.
The light year is used especially in popular science to express interstellar and intergalactic distances, because the unit is very accessible to the general public thanks to its definition: the distance travelled by light in the given period of time.
(only in plural, figurative, informal) light years (a very long way)
(only in plural, figurative, informal) light years (a very long time)
Des années-lumière plus tard, j’émergeai de l’inconscience…
Light years later, I regained consciousness…

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