Pronunciation: (prush'un),[key] —adj. 1. of or pertaining to Prussia or its inhabitants.
2. characterized by, exemplifying, or resembling Prussianism.
—n. 1. a native or inhabitant of Prussia.
2. (originally) one of a Lettic people formerly inhabiting territory along and near the coast at the southeastern corner of the Baltic Sea.
3. a Baltic language formerly spoken in Prussia; Old Prussian. Abbr.: Pruss