verb (used with object), rar·e·fied, rar·e·fy·ing.
verb (used without object), rar·e·fied, rar·e·fy·ing.
Origin of rarefy
Examples from the Web for rarefy
But extend this vapour, rarefy it; from so narrow a room as our natural bodies, to any politic body, to a state.Devotions Upon Emergent Occasions|John Donne
The rarefy of the atmosphere continued to affect the wood-work of the wagons, and the wheels were incessantly falling to pieces.The Adventures of Captain Bonneville|Washington Irving
The air consequently was damp and gross, for want of stronger rays to open and rarefy it.The Boys' and Girls' Plutarch|Plutarch
Would an atmosphere perfumed by these Eastern woods clarify and rarefy our denser Occidental minds?Mentone, Cairo, and Corfu|Constance Fenimore Woolson
But as such means are not at disposal, it becomes necessary to place the terminal in the bulb and rarefy the air in the same.The inventions, researches and writings of Nikola Tesla|Thomas Commerford Martin
British Dictionary definitions for rarefy
verb -fies, -fying or -fied
Word Origin for rarefy
Word Origin and History for rarefy
late 14c., from Old French rarefier (14c.) and directly from Medieval Latin rarificare, from Latin rarefacere "make rare," from rarus "rare, thin" (see rare (adj.1)) + facere "to make" (see factitious). Related: Rarefied.