To recant solemnly; renounce or repudiate: "For nearly 21 years after his resignation as Prime Minister in 1963, he abjured all titles, preferring to remain just plain 'Mr.'” ( Time).
To renounce under oath; forswear.
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.