Bible Dictionaries
Rarefy

Webster's Dictionary

(1):

(v. t.) To make rare, thin, porous, or less dense; to expand or enlarge without adding any new portion of matter to; - opposed to condense.

(2):

(v. i.) To become less dense; to become thin and porous.

Bibliography Information
Webster, Noah. Entry for 'Rarefy'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​r/rarefy.html. 1828.