An addendum is an extra part added to the end of a document, book, or contract to include more information or corrections. It is separate from the main text but officially attached to it.
From Latin 'addendum', meaning 'that which is to be added', from 'addere' (to add). It is a gerundive form, expressing something that ought to be added.
Addendum is a fancy way of saying, 'Wait, there’s more we need to tack on.' The word itself is a reminder that writing—and thinking—often isn’t finished when you think it is.
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