- (uncountable) The act of adding anything.
- The addition of five more items to the agenda will make the meeting unbearably long.
- Anything that is added.
- (arithmetic) (uncountable) The process of adding.
- Dutch: optelling , sommering
- French: addition
- German: Addition
- Italian: addizione
- Spanish: suma
Supplemental Details:Sponsor an extended definition for addition for as little as $10 per month. Click here to contact us.