[ uhn-doo-ing ]
See synonyms for undoing on Thesaurus.com
  1. the reversing of what has been done; annulling.

  2. a bringing to destruction, ruin, or disaster.

  1. a cause of destruction or ruin.

  2. the act of unfastening or loosing.

  3. Psychiatry. an unconscious defense mechanism through which an attempt is made to reverse a psychologically unacceptable act by doing its opposite, usually repetitiously, in order to relieve anxiety.

Origin of undoing

Middle English word dating back to 1300–50; see origin at undo, -ing1

Other words for undoing

Other words from undoing

  • self-un·do·ing, adjective

Words Nearby undoing

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use undoing in a sentence

British Dictionary definitions for undoing


/ (ʌnˈduːɪŋ) /

  1. ruin; downfall

  2. the cause of downfall: drink was his undoing

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012