Of relatively little weight; not heavy:
Long and thin; slender:
Elevated in character; exalted.
Singled out in preference; chosen:
Precise to a fine degree.
Intended for or understood by only a small group, especially one with specialized knowledge or interests:
Having more importance than others; principal:
Out of sight; hidden:
Marked by great diffusion of component particles
Of high spiritual, moral, or intellectual worth.
Exceedingly lofty or exalted:
Of, relating to, or having the nature of an idealist or idealism.
of high moral or intellectual value; elevated in nature or style; ; - Oliver Franks
Sublimate is defined as to cause the change of a gas into a solid or a solid into a gas without becoming a liquid, or to have a refining effect on someone or something.
So as to be thin:
The definition of tighten is to make something more fixed in place, more constricted, or more snug.
Find another word for rarefied. In this page you can discover 26 synonyms, antonyms, idiomatic expressions, and related words for rarefied, like: light, thin, tenuous, lofty, select, refined, esoteric, grand, obscure, attenuated and diluted.