From The Collaborative International Dictionary of English v.0.48:
Uncase \Un*case"\, v. t. [1st pref. un- + case.] [1913 Webster] 1. To take out of a case or covering; to remove a case or covering from; to uncover. --L'Estrange. [1913 Webster]
2. To strip; to flay. [Obs.] [1913 Webster]
3. (Mil.) To display, or spread to view, as a flag, or the colors of a military body. [1913 Webster]