Word.ws English Dictionary

undeclare

undeclare verb: to reverse the process of declaring; to unsay.

Verb

undeclare (third-person singular simple present undeclares, present participle undeclaring, simple past and past participle undeclared)

  1. (transitive) To reverse the process of declaring; to unsay.
    • The Constitution gives Congress the power to declare war; but does that include the power to undeclare it?2007 February 4, Noah Feldman, “Whose War Powers?”, in New York Times
  2. (transitive) To revoke the declaration of (a variable, namespace, etc.) so that it is no longer available.

Forms of undeclare

third-person singular presentundeclares
present participleundeclaring
past participleundeclared
pastundeclared

Origin of undeclare

From un- + declare.

Questions about undeclare

What does undeclare mean?
Undeclare means to reverse the process of declaring; to unsay.
What part of speech is undeclare?
Undeclare is a verb.
What is the past tense of undeclare?
The past tense of undeclare is undeclared.

Words near undeclare in the dictionary

  1. undeclaimed
  2. undeclamatory
  3. undeclarable
  4. undeclaration
  5. undeclarations
  6. undeclare
  7. undeclared
  8. undeclared work
  9. undeclares
  10. undeclaring
  11. undeclinable

Source and license

Adapted from Wiktionary: undeclare (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “undeclare.” Word.ws, https://word.ws/undeclare. Based on Wiktionary, CC BY-SA 4.0.