Addition
//əˈdɪʃ(ə)n// noun
noun ·Common ·Middle school level
Definitions
Noun
- 1 The act of adding anything. uncountable
"The addition of five more items to the agenda will make the meeting unbearably long."
- 2 the act of adding one thing to another wordnet
- 3 Anything that is added. countable, uncountable
- 4 the arithmetic operation of summing; calculating the sum of two or more numbers wordnet
- 5 The arithmetic operation of adding. uncountable
Show 8 more definitions
- 6 a component that is added to something to improve it wordnet
- 7 A dot at the right side of a note as an indication that its sound is to be lengthened one half. countable, uncountable
- 8 a suburban area laid out in streets and lots for a future residential area wordnet
- 9 A title annexed to a person's name to identify him or her more precisely. countable, uncountable
"[…]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[…]"
- 10 something added to what you already have wordnet
- 11 Something added to a coat of arms, as a mark of honour. countable, uncountable
- 12 a quantity that is added wordnet
- 13 an organic reaction where two or more molecules combine to form a larger one (the adduct). countable, uncountable
Example
More examples"To take an express train, we have to get an express ticket in addition to an ordinary ticket."
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”).
Related phrases
More for "addition"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.