Definitions for: Addition

[n] something added to what you have already; "the librarian shelved the new accessions"; "he was a new addition to the staff"
[n] 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"
[n] the arithmetic operation of summing; calculating the sum of two or more numbers; "the summation of four and three gives seven"; "four plus three equals seven"
[n] a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinammon improved the flavor"
[n] a suburban area laid out in streets and lots for a future residential area
[n] a quantity that is added; "there was an addition to property taxes this year"; "they recorded the cattle's gain in weight over a period of weeks"

Webster (1913) Definition: Ad*di"tion, n. [F. addition, L. additio, fr. addere
to add.]
1. The act of adding two or more things together; -- opposed
to subtraction or diminution. ``This endless addition
or addibility of numbers.'' --Locke.

2. Anything added; increase; augmentation; as, a piazza is an
addition to a building.

3. (Math.) That part of arithmetic which treats of adding

4. (Mus.) A dot at the right side of a note as an indication
that its sound is to be lengthened one half. [R.]

5. (Law) A title annexed to a man's name, to identify him
more precisely; as, John Doe, Esq.; Richard Roe, Gent.;
Robert Dale, Mason; Thomas Way, of New York; a mark of
distinction; a title.

6. (Her.) Something added to a coat of arms, as a mark of
honor; -- opposed to abatement.

Vector addition (Geom.), that kind of addition of two
lines, or vectors, AB and BC, by which their sum is
regarded as the line, or vector, AC.

Syn: Increase; accession; augmentation; appendage; adjunct.

Synonyms: accession, gain, improver, increase, plus, summation

Antonyms: deduction, subtraction

See Also: accretion, acquisition, additive, afterthought, annex, annexation, annexe, arithmetic operation, attachment, component, constituent, element, elongation, extension, fluoridation, fluoridisation, fluoridization, increase, indefinite quantity, retrofit, step-up, suburb, suburban area, suburbia, wing

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