Sense of “what is added” dates from 14th century, from Old French adition, from Latin additiōnem, accusative singular of additiō, from addō (“add, put”).
addition (countable and uncountable, plural additions)
- (uncountable) The act of adding anything.
- Anything that is added.
- (uncountable) The arithmetic operation of adding.
- (music) A dot at the right side of a note as an indication that its sound is to be lengthened one half.
- (chiefly law) A title annexed to a person's name to identify him or her more precisely, as in "John Doe, Esq.", "Robert Dale, Mason", "Thomas Way, of New York".
- (heraldry) Something added to a coat of arms, as a mark of honour; opposed to abatement.
Try searching for words with the letters ADDITION, words with the phrase ADDITION, words starting with the letters ADDITION, or words ending in the letters ADDITION.