(chiefly historical) A geographical area on the Baltic coast of northeastern Europe.

(historical) A historical province of Prussia and Germany, since WWII divided between Poland and Russia. A small part of the territory is part of Lithuania.

A census-designated place in Upper Merion Township, Montgomery County, Pennsylvania. / The King of Prussia Mall.

(historical) A historical province of Prussia from 1773 to 1829 and 1878 to 1922.

(chemistry, obsolete) A ferricyanide, ferrocyanide or cyanide.

(inorganic chemistry) An insoluble dark, bright blue pigment, ferric ferrocyanide (equivalent to ferrous ferricyanide), used in painting and dyeing, and as an antidote for certain kinds of heavy metal poisoning.

Of a rich blue colour, tinted with green.

Of, from, or pertaining to Prussia.

The Prussian language; see Old Prussian and New Prussian.

A native or inhabitant of the geographical region of Prussia. / (historical) A citizen of the German state of Prussia.