noun🔗ShareNovaAny sudden brightening of a previously inconspicuous star.""Astronomers were excited to observe a nova appear suddenly in the night sky, where previously there had only been a faint star." "Les astronomes étaient ravis d'observer une nova apparaître soudainement dans le ciel nocturne, là où il n'y avait auparavant qu'une faible étoile.astronomyspacesciencephenomenaChat with AIVocabulary GamePractice Reading