rarefy

rar·e·fy

verb

rar·e·fied also rar·i·fiedrar·e·fy·ing also rar·i·fy·ing

Definition of RAREFY

transitive verb

: to make rare, thin, porous, or less dense : to expand without the addition of matter

intransitive verb

: to become less dense

Variants of RAREFY

rar·e·fy also rar·i·fy \ˈrar-ə-ˌfī, ˈrer-\