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The Baltic language of eastern Prussia that became extinct in the 1700s.
(Languages) the former language of the non-German Prussians, belonging to the Baltic branch of the Indo-European family: extinct by 1700
the extinct language of the Baltic-speaking Prussians, attested principally in several religious texts of the 16th century. Abbr.: OPruss
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|Noun||1.||Old Prussian - a dead language of the (non-German) Prussians (extinct after 1700); thought to belong to the Baltic branch of Indo-European|