Codicil

//ˈkɒdɪsɪl// noun, verb

noun, verb ·Uncommon ·College level

Definitions

Noun
  1. 1
    An addition or supplement that explains, modifies, or revokes a will or part of one.
  2. 2
    a supplement to a will; a testamentary instrument intended to alter an already executed will wordnet
  3. 3
    An addition or supplement modifying any official document, such as a treaty.

    "So insistent was this demand that the Wyandot actually received a codicil to the treaty […]"

  4. 4
    Any appendix or addition. broadly

    "If Nick answered a question Wani listened to him and then gave a flat little codicil or correction."

Verb
  1. 1
    To add a codicil (to). ergative

Synonyms

All synonyms
addendumaffixafterthoughtallongeappendixattested copy

Example

More examples

"So insistent was this demand that the Wyandot actually received a codicil to the treaty […]"

Etymology

Borrowed from Middle French codicille, from Latin cōdicillus, diminutive of cōdex. See code.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.