Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

Thesaurus

addition

noun

Synonyms and Antonyms of addition

1 a smaller structure added to a main building
  • a new addition to the library providing space for an expanded video collection
Synonyms of addition

annex, extension, penthouse
Words Related to addition

arm, ell, wing
2 something added (as by growth)
  • the cache of old stamps I found in the discarded desk was a huge addition to my stamp collection
Synonyms of addition

accretion, accrual, addendum, augmentation, boost, expansion, gain, increase, increment, more, plus, proliferation, raise, rise, step-up, supplement, uptick
Words Related to addition

accumulation, assemblage, collection, gathering

complement

accession, appendix, continuation, extension, uptrend, upturn

jump, run-up, spike
Near Antonyms of addition

deduction, subtraction
Antonyms of addition

abatement, decline, decrease, decrement, depletion, diminishment, diminution, drop-off, fall, falloff, lessening, loss, lowering, reduction, shrinkage, step-down
3 the act or process of becoming greater in number
  • how do you account for the addition of more paint stains on your shirt after you put on a smock?
Synonyms of addition

accumulating, accumulation, increase, multiplication, mushrooming, proliferation
Words Related to addition

doubling, quadrupling, tripling

creep, growth, rise, spread

enlargement, escalation, expansion

amplification, distension (or distention), inflation

accretion, accrual, augmentation, cumulation

extension, lengthening

boost, gain, hike, increment, rise
Near Antonyms of addition

abatement, compressing, compression, condensation, condensing, constricting, constriction, contracting, contraction, diminishing, diminishment, diminution, drop, drop-off, fall, falloff, lessening, lowering, reduction, shrinkage, shrinking

retrenching, retrenchment, shortening
Antonyms of addition

decrease

Learn More about addition

  1. See words that rhyme with addition Dictionary: Definition of addition Spanish Central: Translation of addition Nglish: Translation of addition for Spanish speakers Britannica English: Translation of addition for Arabic speakers Britannica.com: Encyclopedia article about addition

Seen and Heard

What made you want to look up addition? Please tell us where you read or heard it (including the quote, if possible).

show comments hide comments

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

parabolic

Listen to the pronounciation of parabolic

of or relating to a parable or parabola

Get Word of the Day daily email!

TRENDING NOW

  1. crawdad New novel makes waves

  2. non sequitur, sequitur Manafort judge addresses defense

  3. trope AOC tweets against border wall

SEE ALL

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words at Play

Ask the Editors

Word Games