addn.

Noun

addition (countable and uncountable, plural additions)

1. (uncountable) The act of adding anything.
   • The addition of five more items to the agenda will make the meeting unbearably long.

   Synonyms:

   adding, annexation, inclusion, infusion

2. Anything that is added.

   Synonyms:

   extra

3. (uncountable) The arithmetic operation of adding.
4. A dot at the right side of a note as an indication that its sound is to be lengthened one half.
5. A title annexed to a person's name to identify him or her more precisely.
   • […]They clip vs drunkards, and with Swiniſh phraſe / Soyle our addition, and indeede it takes / From our atchieuements, though perform’d at height / The pith and marrow of our attribute[…]c. 1599–1602 (date written), William Shakespeare, The Tragicall Historie of Hamlet, Prince of Denmarke: […] (Second Quarto), London: […] I[ames] R[oberts] for N[icholas] L[ing] […], published 1604...
6. Something added to a coat of arms, as a mark of honour.

   Antonyms:

   abatement

See all 7 meanings of addition