1. 
[syn: hardening, solidifying, solidification, set, curing]
The Collaborative International Dictionary of English v.0.48:
Solidify \So*lid"i*fy\, v. t. [imp. & p. p. Solidified; p. pr.
   & vb. n. Solidifying.] [Solid + -fy: cf. F. solidifier.]
   To make solid or compact.
   [1913 Webster]
         Every machine is a solidified mechanical theorem. --H.
                                                  Spencer.
   [1913 Webster]
WordNet (r) 3.0 (2006):
solidifying
    n 1: the process of becoming hard or solid by cooling or drying
         or crystallization; "the hardening of concrete"; "he tested
         the set of the glue" [syn: hardening, solidifying,
         solidification, set, curing]