1. (noun)addition, add-on, improver a component that is added to something to improve it Synonyms: add-on, improver, summation, appurtenance, increase, supplement, humanitarian, addition, accession, accessory, do-gooder, plus, gain Antonyms: deduction, subtraction
2. (noun)addition the act of adding one thing to another Synonyms: increase, summation, plus, gain, accession, add-on, improver Antonyms: subtraction, deduction
3. (noun)addition, increase, gain a quantity that is added Synonyms: add-on, profit, improver, summation, amplification, increase, growth, increment, addition, accession, step-up, plus, gain Antonyms: deduction, subtraction
4. (noun)accession, addition something added to what you already have Synonyms: add-on, improver, admission, increase, summation, entree, admittance, rise to power, addition, accession, access, assenting, plus, gain Antonyms: deduction, subtraction
5. (noun)addition a suburban area laid out in streets and lots for a future residential area Synonyms: increase, summation, plus, gain, accession, add-on, improver Antonyms: deduction, subtraction
6. (noun)summation, addition, plus the arithmetic operation of summing; calculating the sum of two or more numbers Synonyms: add-on, improver, increase, sum, summing up, sum total, summation, rundown, accession, asset, gain, plus, addition Antonyms: subtraction, deduction
Synonyms, Thesaurus & Antonyms of 'addition'
English Synonyms and Antonyms
1. addition An adjunct (something joined to) constitutes no real part of the thing or system to which it is joined, tho perhaps a valuable addition; an appendage is commonly a real, tho not an essential or Synonyms: appendage, accessory, addition, appurtenance, concomitant, accompaniment, adjunct, attachment, extension, addendum, appendix, auxiliary, supplement Antonyms: main body, original, total, whole
Synonyms for addition 
