Join iLoop users around the world who have learned that there is only one question left to ask: What will they do with all their free time now? Join iLoop users around the world who have learned that there is only one question left to ask:
1794, literally something added, from Latin addendum, neuter of addendus that which is to be added, gerundive of addere (see add (v.)). Classical plural form is addenda.
Webster Dictionary(3.00 / 3 votes)Rate this definition: 1  Suffix(noun) a letter, letters, syllable, or syllables added or appended to the end of a word or a root to modify the meaning; a postfix. 2  Suffix(noun) a subscript mark, number, or letter. 3  Suffix(verb) to add or annex to the end, as a letter or syllable to a word; to append.