ap·​pen·​dix | \ ə-ˈpen-diks How to pronounce appendix (audio) \
plural appendixes or appendices\ ə-​ˈpen-​də-​ˌsēz How to pronounce appendix (audio) \

Definition of appendix

1a : appendage
b : supplementary material usually attached at the end of a piece of writing The book's appendix includes a bibliography.
2 : a bodily outgrowth or process specifically : vermiform appendix

Synonyms & Antonyms for appendix



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Examples of appendix in a Sentence

In your textbooks, turn to Appendix 3: Glossary of Terms. The book has several appendixes .
Recent Examples on the Web But the study doesn’t assume the city will provide parks and recreation at all, discussing it only as a potential service in an appendix. Brian Eason, ajc, 5 May 2022 Costar Dolores Catania later revealed that Giudice had her appendix was removed. Dory Jackson,, 31 Mar. 2022 That's how many enslaved people are documented as being owned by Harvard staff or donors in an appendix to the report, almost all either unnamed or known only by their first name. Nicholas Reimann, Forbes, 26 Apr. 2022 In the appendix to the paper, the researchers include a long list of before-and-after snapshots, all of which showcase the serious vulnerabilities that exist in the raw GPT-3 without PALMS interventions. New York Times, 12 Apr. 2022 The interest in the Bucks star had grown for the O'Donnells during a medical scare for Brady last summer, when his appendix ruptured on Father's Day weekend. Jr Radcliffe, Milwaukee Journal Sentinel, 6 Apr. 2022 Without insurance, Maria would be responsible to pay for the entire hospital bill (the average cost to remove an appendix is about $33,000). The Salt Lake Tribune, 6 Apr. 2022 An appendix attached to the city’s contract with the company states that CensusChannel will compile information about the city’s current boundaries as well as demographic data. Emily Opilo,, 2 Mar. 2022 Even in the final version of the curriculum, Jews have been relegated to an appendix. The Editors, National Review, 18 Mar. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'appendix.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of appendix

1542, in the meaning defined at sense 1a

History and Etymology for appendix

Latin appendic-, appendix, from appendere — see append

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Time Traveler for appendix

Time Traveler

The first known use of appendix was in 1542

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Dictionary Entries Near appendix



appendix digitiformis

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Statistics for appendix

Last Updated

16 May 2022

Cite this Entry

“Appendix.” Dictionary, Merriam-Webster, Accessed 27 May. 2022.

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More Definitions for appendix


ap·​pen·​dix | \ ə-ˈpen-diks How to pronounce appendix (audio) \
plural appendixes or appendices\ -​də-​ˌsēz \

Kids Definition of appendix

1 : a part of a book giving added and helpful information (as notes or tables)
2 : a small tubelike part growing out from the large intestine


ap·​pen·​dix | \ ə-ˈpen-diks How to pronounce appendix (audio) \
plural appendixes or appendices\ -​də-​ˌsēz How to pronounce appendix (audio) \

Medical Definition of appendix

: a bodily outgrowth or process specifically : vermiform appendix

More from Merriam-Webster on appendix

Nglish: Translation of appendix for Spanish Speakers

Britannica English: Translation of appendix for Arabic Speakers Encyclopedia article about appendix


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