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Definitions

addition

[uh-dish-uhn] / əˈdɪʃ ən /
NOUN
process of conjoining, adding
Synonyms
STRONGEST
extension inclusion
STRONG
accession annexation attachment augmentation enlargement
WEAK
adding adjoining affixing increasing
Antonyms
STRONG
decrease
WEAK
deduction lessening loss reduction shrinkage subtraction withdrawal
NOUN
something conjoined to or enlargement of something
Synonyms
STRONGEST
bonus boost enhancement expansion extension supplement
STRONG
accession accessory accretion accrual addendum additive adjunct aggrandizement annex appendage appendix attachment augmentation commission dividend enlargement extra gain hike increase increment markup option profit raise reinforcement rise wing
Antonyms
STRONGEST
decrease
STRONG
decline drop fall lessening loss reduction shrinkage subtraction
WEAK
deduction withdrawal
NOUN
arithmetical process of augmentation
Synonyms
STRONG
accretion computing counting reckoning summation
WEAK
accruing adding enlarging expanding increasing summing tabulating totaling toting
Antonyms
WEAK
decrease deduction lessening loss reduction shrinkage subtraction withdrawal

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It will probably take less given Liverpool still have to play Everton and Chelsea, in addition to their own trip to Old Trafford on 3 May.

From BBC • Apr. 18, 2026

With Mejia’s addition, Democrats will have 214 representatives, while Republicans have 217, and one independent caucuses with the GOP.

From Salon • Apr. 18, 2026

In addition, the results suggest that parts of Doggerland persisted through major flooding events, including the Storegga tsunami about 8,150 years ago, with some areas remaining above water until roughly 7,000 years ago.

From Science Daily • Apr. 17, 2026

In addition to his World Series Game 7 heroics, Anderson batted .300 with four doubles, two home runs and 13 RBIs during the 2002 postseason.

From Los Angeles Times • Apr. 17, 2026

For by now, in addition to the workers whom we wanted to initiate into the system, we had three more permanent boarders: Thea Dacosta, Meta Monsanto, and Mary Itallie.

From "The Hiding Place" by Corrie ten Boom

Vocabulary lists containing addition

Arithmetic

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List 1

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The Number System

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