noun
or departmental stamp
: an official postage stamp issued for use in a particular government department, as one of a series issued in the United States 1873-79
noun
or departmental stamp
: an official postage stamp issued for use in a particular government department, as one of a series issued in the United States 1873-79
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012