Of or relating to Masuria, a low-lying forested region of north-east Poland (formerly part of East Prussia) containing numerous glacial lakes. Chiefly in "Masurian Lakes".
An inhabitant of Masuria.
Early 20th century; earliest use found in The Times. Either from the name of Masuria + -an, or directly from German Masur- (in Masuren) + -ian, after German Masurisch.