- a member of the privileged aristocracy in czarist Russia, ranking just below the ruling princes: the rank was abolished by Peter I
- a member of the privileged aristocracy in Romania
Origin of boyarRussian bojarin, grandee ; from boj, battle ; from Indo-European base an unverified form bhei-, to strike
Origin of boyarAlteration (influenced by French boyard, from Russian boyarin) of Early Modern English boiaren, from Russian boyarin, from Old Russian bolyarinŭ, from Old Church Slavonic, probably from Bulgar Turkic (Turkic language of a Turkic tribe that settled in the Volga and Danube basins in the early Middle Ages ) *boyla er, noble man : boyla, Turkic nobleman of a rank below a khan (from Old Turkic) + *er, man; akin to Turkish er (from Old Turkic).
- (historical) A rank of aristocracy (second only to princes) in Russia, Bulgaria and Romania.
From Russian бояре (bojáre), plural of боярин (bojárin).