Definition of addendum in English:


Line breaks: ad¦den|dum
Pronunciation: /əˈdɛndəm

noun (plural addenda /-də/)

1An item of additional material added at the end of a book or other publication.
More example sentences
  • The cover has changed, the map of Egypt is missing, and additions and corrections have been placed as an addendum on page 205 instead of directly in the text.
  • For the articles that appeared in the earlier edition, addenda include the new data that is available; only a handful of the original articles were rewritten.
  • He welcomes any professional updates or addenda to his primer.
2 Engineering The radial distance from the pitch circle of a cogwheel or wormwheel to the crests of the teeth or ridges. Compare with dedendum.


late 17th century: Latin, 'that which is to be added', gerundive of addere (see add).

Definition of addendum in: