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rar·e·fyalso rar·i·fy (râr′ə-fī′)
v. rar·e·fied, rar·e·fy·ing, rar·e·fies also rar·i·fied or rar·i·fy·ing or rar·i·fies
1. To make thin or less dense, as air.
2. To purify or refine: "The [medieval] Italians ... rarefy the image of the lady, treating her as a quasi-celestial figure" (Marcia L. Colish).
To become thin or less dense.
[Middle English rarefien, from Old French rarefier, from Medieval Latin rārificāre, alteration of Latin rārēfacere : rārus, rare + facere, to make; see dhē- in Indo-European roots.]
vb, -fies, -fying or -fied
to make or become rarer or less dense; thin out
[C14: from Old French raréfier, from Latin rārēfacere, from rārus rare1 + facere to make]
v. -fied, -fy•ing. v.t.
1. to make rare or rarer; make less dense: to rarefy a gas.
2. to make more refined or spiritual.v.i.
3. to become less dense; become thinned.
Past participle: rarefied
Switch to new thesaurus
|Verb||1.||rarefy - lessen the density or solidity of; "The bones are rarefied"|
|2.||rarefy - make more subtle or refined|
|3.||rarefy - weaken the consistency of (a chemical substance)|
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
weaken - lessen the strength of; "The fever weakened his body"