Definition of Addenda Addenda means written and/or graphic instructions issued by the University subsequent to the receipt of proposals that modify or interpret the Request for Proposal documents by addition, deletions, clarification, or corrections. Addenda means written and/or graphic instructions issued by the University
addend(Noun) Any one of two or more numbers or other terms that are to be added together. addend(Noun) A moiety added to another molecule. addend(Verb) To furnish with an addendum. addend(Verb) To furnish with an addend.
The forms are never interchangeable— addenda is always plural and never singular. The opposite is true for addendum. Since addendum contains the letter M, like the prefix mono- (which refers to one of something), you should find it easy to remember that addendum refers to only one of these things.
Definition of addendum 1 : a thing added : addition 2 : a supplement to a book —often used in plural but singular in construction