'Unfreeze' definitions:

Definition of 'unfreeze'

(from WordNet)
verb
Become or cause to become soft or liquid; "The sun melted the ice"; "the ice thawed"; "the ice cream melted"; "The heat melted the wax"; "The giant iceberg dissolved over the years during the global warming phase"; "dethaw the meat" [syn: dissolve, thaw, unfreeze, unthaw, dethaw, melt]
verb
Make (assets) available; "release the holdings in the dictator's bank account" [syn: unblock, unfreeze, free, release] [ant: block, freeze, immobilise, immobilize]

Definition of 'Unfreeze'

From: GCIDE
  • Unfreeze \Un*freeze"\, v. t. [1st pref. un- + freeze.] To thaw. [Obs.] [1913 Webster]