Definition of addendum in English:



  • 1An item of additional material added at the end of a book or other publication.

    • ‘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.’
    • ‘When I get around to reading the book, perhaps I'll make a small addendum to this review.’
    • ‘He tackles his subject in six chapters supplemented by addenda from other scholars.’
    • ‘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.’
    • ‘At the end of the column, an addendum will list several royal recipes for you to try.’
    • ‘For those of you who haven't read the Act itself, the document is a fragmented mess of addenda, revisions, and additions to the U.S. Civil Code.’
    • ‘Ashley emailed me this morning with a list of errata and addenda.’
    • ‘It had an addendum page printed in blue, with some late-breaking news.’
    • ‘If I source one in the future, I will publish an addendum to this review.’
    • ‘Just a few months before his death on 29 June 1988, he wrote an addendum to his early essay ‘Two Theological Languages,’ which was being republished.’
    • ‘He welcomes any professional updates or addenda to his primer.’
    • ‘This addendum accomplishes several rhetorical tasks at once.’
    • ‘With most products, the crucial information on commission, which the IFA is required to reveal, comes as an addendum at the end of a 12-page document.’
    • ‘These texts, along with genealogical charts, photographs of manuscript leaves, and other useful addenda add to the overall scholarly nature of the collection.’
    • ‘There are concluding addenda, appendices, and a thankfully comprehensive index.’
    • ‘In addition, the paper comes with an on-line addendum of about 100 pages, although this is unfigured and largely concerns the cladistic analysis.’
    • ‘Many of these excerpts have not previously been published, and they include a major addition to his literary corpus - a 52-page manuscript addendum to Nabokov's most important Russian novel, The Gift.’
    • ‘But he added after pressure from Mr Gray: ‘We will be publishing those figures as a addendum by the end of March.’’
    • ‘Would it help matters if I published your addendum?’
    • ‘This section is little more than an addendum to the rest of the book and would not be missed.’
    appendix, codicil, postscript, afterword, tailpiece, rider, coda, supplement, accompaniment
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  • 2Engineering
    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).