"...upon a person..." is the operative phrase. An unloaded gun in a gun case is not considered concealed. Purses are a gray area depending on whether they're considered part of a person's clothing. Bags, suitcases, gun cases, briefcases, etc are not considered "upon a person."
NRS 202.3653 Definitions. As used in NRS 202.3653 to 202.369, inclusive, unless the context otherwise requires:
1. “Concealed firearm” means a loaded or unloaded pistol, revolver or other firearm which is carried upon a person in such a manner as not to be discernible by ordinary observation.