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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.

In addition to missing peace negotiations with Iran in Islamabad, Pakistan, he did not attend meetings in Doha and Geneva.

From Salon • May 5, 2026

That addition is also supporting the dollar, Wizman notes.

From Barron's • May 4, 2026

In addition to the three deaths, a fourth passenger was evacuated to a South African hospital and was in intensive care, and two crew members fell ill.

From Los Angeles Times • May 4, 2026

In addition to addressing AI agents, the company again made its case for being a major presence in stablecoins, too.

From The Wall Street Journal • May 4, 2026

In addition, there were blood ties linking Europe’s royal houses.

From "The War to End All Wars: World War I" by Russell Freedman

Vocabulary lists containing addition

Arithmetic

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List 1

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The Number System

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