Definition of "appendix" in English

noun

1. (obsolete in general sense) Something attached to something else; an attachment or accompaniment.

   • Near-synonyms: ancillary, auxiliary
   • idleness is an appendix to nobility; they count it a disgrace to work, and spend all their days in sports, recreations, and pastimes […]

2. A text added to the end of a book or an article, containing additional information.

   • Holonym: back matter
   • Near-synonyms: supplement (sometimes synonymous), addendum, codicil

3. (anatomy) The vermiform appendix.

4. (anatomy) Any process, prolongation, or projection.