The American Heritage® Dictionary of the English Language, 4th Edition
n. A member of a class of higher Russian nobility that until the time of Peter I headed the civil and military administration of the country and participated in an early duma.
n. A rank of aristocracy (second only to princes) in Russia, Bulgaria and Romania.
the GNU version of the Collaborative International Dictionary of English
n. A member of a Russian aristocratic order abolished by Peter the Great. Also, one of a privileged class in Roumania.
The Century Dictionary and Cyclopedia
n. A personal title given to the highest class of Russian officials previous to the reign of Peter the Great.
Word Usage
"No matter how much money there is to be made in Russia these days, it ultimately doesn't count for much the day a boyar or simple chinovnik decides to take it away."