say it: RER-uh-fahyd
rarefied is an adjective meaning "having low density". It carries 2 recorded senses.
of high moral or intellectual value; elevated in nature or style
“an exalted ideal”
“argue in terms of high-flown ideals”
“a noble and lofty concept”
“a grand purpose”
Definitions, synonyms and semantic relations for rarefied come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.