Define Addendum Meaning

Addendum
Something that is added or later to be added, e.g. a supplement to a book.

"I decided to add an addendum to my novel after I'd finished writing it."
By Clio
Addendumed
When something has had an addendum, it is said to be "addendumed"

John made an addendum to that article. He addendumed it.
By Adaline
Mannerly Addendum
An "afterthought" phrase that someone throws in at the end of a sentence to modify it into a more-polite statement.

A classic mannerly addendum is when someone hastily asks you to perform a certain task as he is rushing out the door, then pleasantly adds, "Please and thank you" after he's voiced his request.
By Devinne