ad·di·tion /əˈdɪʃən, æ-/
1. The act of adding two or more things together; -- opposed to subtraction or diminution. “This endless addition or addibility of numbers.”
2. Anything added; increase; augmentation; as, a piazza is an addition to a building.
3. Math. That part of arithmetic which treats of adding numbers.
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.
n 1: 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" [syn: add-on,
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" [ant: subtraction]
3: 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" [syn: increase, gain]
4: something added to what you already have; "the librarian
shelved the new accessions"; "he was a new addition to the
staff" [syn: accession]
5: a suburban area laid out in streets and lots for a future
6: 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" [syn: summation,