1) Princess 2) The wife of an archduke 
• (n.) The consort of an archduke; also, a princess of the imperial family of Austria. See Archduke.
Arch`duch'ess noun [ Prefix arch- + duchess .] The consort of an archduke; also, a princess of the imperial family of Austria. See Archduke . 
[n] - a wife or widow of an archduke or a princess of the former ruling house of Austria
noun a wife or widow of an archduke or a princess of the former ruling house of Austria
the wife of an archduke. · a princess of the Austrian imperial family.