addition

Etymology

Sense of “what is added” dates from 14th century, from Middle English addicioun, addition, from Old French adition, from Latin additiōnem, accusative singular of additiō, from addō (“add, put”).

noun

1. (uncountable) The act of adding anything.
   The addition of five more items to the agenda will make the meeting unbearably long.
2. Anything that is added.
3. (uncountable) The arithmetic operation of adding.
4. (music) A dot at the right side of a note as an indication that its sound is to be lengthened one half.
5. (chiefly law) A title annexed to a person's name to identify him or her more precisely.
6. (heraldry) Something added to a coat of arms, as a mark of honour.