undo

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Pronunciation[change]

  • IPA: /ʌnˈduː/
  • SAMPA: /Vn"du:/
  • Hyphenation: un‧do

Homophones[change]

Verb[change]

Plain form
undo

Third person singular
undoes

Simple past
undid

Past participle
undone

Present participle
undoing

  1. (transitive) If you undo an action, you reverse it.
    We can undo the damage to the system.
  2. (transitive) If you undo something, unfasten it.
    Could you undo my buckle for me?
  3. (computers) If you undo something in a computer program, you reverse a change done in the file.
    I had to undo all of the bad edits that my naughty little brother made.

Noun[change]

Singular
undo

Plural
undoes

  1. (computers) An undo is a function in a computer program that can reverse a change done to a file.
    This program can do up to 20 undoes.