Addendum/əˈdendəm/ Definition 1 of 2Pro Tip 1/3Often Postscripts Addenda are often used to add afterthoughts or explain updates. See the addendum for recent study results. Pro Tip 2/3Technical Details Can contain detailed information like statistical data or references. Refer to the addendum for the technical specifications. Pro Tip 3/3Clarification Purpose Used to clarify or correct earlier content within the main text. The error on page 47 is corrected in the addendum.