dis·af·firm (dĭs'ə-fûrm')
tr.v., -firmed, -firm·ing, -firms.

1. To deny or contradict. See synonyms at deny.
2. Law. To repudiate.

disaffirmance dis'af·fir'mance (dĭs'ə-fûr'məns) or dis·af'fir·ma'tion (dĭs-ăf'ər-mā'shən) n.

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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