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undo

play
verb, un·do \ˌən-ˈdü, ˈən-\

Simple Definition of undo

  • : to open or release (something) : to unfasten or loosen (something)

  • : to change or stop the effect of (something)

  • : to cause the failure of (someone or something)

Source: Merriam-Webster's Learner's Dictionary

Full Definition of undo

undidplay \-ˈdid\undoneplay \-ˈdən\undoingplay \-ˈdü-iŋ\

  1. transitive verb
  2. 1 :  to open or loose by releasing a fastening

  3. 2 :  to make of no effect or as if not done :  make null :  reverse

  4. 3 a :  to ruin the worldly means, reputation, or hopes of <a politician undone by scandal> b :  to disturb the composure of :  upset <she's come undone> c :  seduce 3

  5. intransitive verb
  6. :  to come open or apart

undoer play \-ˈdü-ər\ noun

UNDO Defined for Kids

undo

play
verb un·do \ˌən-ˈdü\

Definition of undo for Students

undid \-ˈdid\undone \-ˈdən\undoing \-ˈdü-iŋ\undoes \-ˈdəz\

  1. 1 :  untie 2, unfasten <Can you undo this knot?>

  2. 2 :  to cancel the effect of :  reverse <The damage cannot be undone.>

  3. 3 :  to cause the ruin or failure of <He was undone by greed.>





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