obdurate Share definition Flag stubborn person who will not admit to any errors. Not prone to feelings. The Republican Party can be synonymous with the word obdurate. I was arguing politics with with Sam. He would not back down on the birther argument on Obama. Well, he is a republican. obdurate by BF'ngC October 9, 2012 0 0 Get merch Get the obdurate mug. Buy Now — $32.95 See more merch