Rarefying

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Rarefy \Rar"e*fy\ (r[a^]r"[-e]*f[imac]; 277), v. t. [imp. & p.
     p. {Rarefied} (r[a^]r"[-e]*f[imac]d); p. pr. & vb. n.
     {Rarefying} (r[a^]r"[-e]*f[imac]`[i^]ng).] [F. rar['e]fier;
     L. rarus rare + -ficare (in comp.) to make; cf. L.
     rarefacere. See {-fy}.]
     To make rare, thin, porous, or less dense; to expand or


     enlarge without adding any new portion of matter to; --
     opposed to condense.
     [1913 Webster]