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1.
Slavic word for 'ruler', like king or emperor.
Teacher: You see, kids, Ivan Grozny was the vladar of Russia.

Student: He was what?

Teacher: You come to my class, and you don't know what vladar means?? GTFO
by djehud May 31, 2010
 
2.
Anything great and amazing.
'Dude you just vladar'd that fool!'
'I know, he has nothing on me'
by Theabominablesnowman June 13, 2008