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Noun: addition  u'di-shun
  1. A component that is added to something to improve it
    "the addition of a bathroom was a major improvement";
    - add-on, improver
  2. The act of adding one thing to another
    "the addition of flowers created a pleasing effect"; "the addition of a leap day every four years"
  3. A quantity that is added
    "there was an addition to property taxes this year";
    - increase, gain
  4. Something added to what you already have
    "he was a new addition to the staff";
    - accession
  5. A suburban area laid out in streets and lots for a future residential area
  6. The arithmetic operation of summing; calculating the sum of two or more numbers
    "the addition of four and three gives seven";
    - summation, plus

Sounds like: edition

Derived forms: additions

Type of: acquisition, arithmetic operation, burb [N. Amer, informal], component, constituent, element, increase, indefinite quantity, step-up, suburb, suburban area, suburbia

Antonym: subtraction

Encyclopedia: Addition