noun🔗ShareAnnée-lumièreA 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."Astronomers estimate that the galaxy is about 100,000 ly across. "Les astronomes estiment que la galaxie mesure environ 100 000 années-lumière de diamètre.astronomyphysicsspaceunitsciencemathChat with AIVocabulary GamePractice Reading
noun🔗ShareLongues distances(only in plural) A very long way."The marathon runner in the lead is light years ahead of the one at the back."Le marathonien en tête a des années-lumière d'avance sur celui qui est à l'arrière.wayspaceplaceChat with AIVocabulary GamePractice Reading
noun🔗ShareDes lustres(only in plural) A very long time."Some of Leonardo da Vinci’s inventions were light years ahead of their time."Certaines des inventions de Léonard de Vinci étaient en avance de plusieurs lustres sur leur temps.timepastChat with AIVocabulary GamePractice Reading
