'Prussian' definitions:

Definition of 'Prussian'

(from WordNet)
adjective
Of or relating to or characteristic of Prussia or its inhabitants; "Prussian officers"; "Prussian aristocracy"
noun
A German inhabitant of Prussia

Definition of 'Prussian'

From: GCIDE
  • Prussian \Prus"sian\, a. [From Prussia, the country: cf. F. prussien.] Of or pertaining to Prussia. -- n. A native or inhabitant of Prussia. [1913 Webster]
  • Prussian blue (Chem.), any one of several complex double cyanides of ferrous and ferric iron; specifically, a dark blue amorphous substance having a coppery luster, obtained by adding a solution of potassium ferrocyanide (yellow prussiate of potash) to a ferric salt. It is used in dyeing, in ink, etc. Called also Williamson's blue, insoluble Prussian blue, Berlin blue, etc.
  • Prussian carp (Zool.) See Gibel.
  • Prussian green. (Chem.) Same as Berlin green, under Berlin. [1913 Webster]