To act on the pretense that repetitive actions will provide a solution rather than finding a more effective way.
Repeatably trying the same button combination in a game that has already proven to not be the answer.
IE: "Johnny cuts himself when preparing food tonight because he is using the knife wrong. Johnny on average cuts himself 5 times a month. Johnny's ignorance makes his way of chopping up food very hazardous to his health."
Actually most of these definitions are written by ignorant people, who shouldn't be giving "definitions" to others.
Actually in real life Pocahontas had no hair.
Cool person: Loser. ignorance isn't something to be proud of.