Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Thesaurus

addition

noun

Synonyms and Antonyms of addition

  1. 1 a smaller structure added to a main building <a new addition to the library providing space for an expanded video collection> Synonyms annex, extension, penthouseRelated Words arm, ell, wing

  2. 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 accretion, accrual, addendum, increase, augmentation, boost, expansion, gain, increment, more, plus, proliferation, raise, rise, step-up, supplement, uptickRelated Words accumulation, assemblage, collection, gathering; complement; accession, appendix, continuation, extension, uptrend, upturn; jump, run-up, spikeNear Antonyms deduction, subtractionAntonyms abatement, decline, decrease, decrement, depletion, diminishment, diminution, drop-off, fall, falloff, lessening, loss, lowering, reduction, shrinkage, step-down

  3. 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 accumulating, accumulation, multiplication, increase, mushrooming, proliferationRelated Words 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, riseNear Antonyms abatement, compressing, compression, condensation, condensing, constricting, constriction, contracting, contraction, diminishing, diminishment, diminution, drop, drop-off, fall, falloff, lessening, lowering, reduction, shrinkage, shrinking; retrenching, retrenchment, shorteningAntonyms decrease





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).

WORD OF THE DAY

February 12, 2016

of, relating to, or suggestive of marble

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

16.96 pounds 2.2 pounds 196.5 pounds 100 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ