verb🔗ShareTo make rare, thin, porous, or less dense"As the hikers climbed higher up the mountain, the air began to rarefy, making it difficult to breathe. "physicschemistrymaterialenvironmentscienceChat with AIVocabulary GamePractice Reading
verb🔗ShareTo expand or enlarge without adding any new portion of matter to."As the air rises, it begins to rarefy, making it harder to breathe at higher altitudes. "physicssciencematerialsubstanceChat with AIVocabulary GamePractice Reading
