To refuse to acknowledge or accept as one's own; repudiate.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "disown" in a sentence
"So, it's no wonder these white voters can say they'll "disown" their own party if Obama is the nominee."
"Clinton's group of supporters are a people who find it easier to "disown" their own family members if they are upset with them."
"It's a little late for Obama to express such outrage, especially since Wright isn't saying anything new, and especially after Obama told us all that he cannot "disown" Wright."