noun🔗ShareRaréfactionA reduction in the density of a material, especially that of a fluid."The sudden rarefaction of air near the explosion caused a sharp drop in pressure that shattered nearby windows. "La raréfaction soudaine de l'air près de l'explosion a provoqué une forte baisse de pression qui a brisé les fenêtres voisines.physicsmaterialsubstanceChat with AIVocabulary GamePractice Reading
