[syn: summation, addition, plus]
The Collaborative International Dictionary of English v.0.48:
Addition \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.
[1913 Webster]
2. Anything added; increase; augmentation; as, a piazza is an
addition to a building.
[1913 Webster]
3. (Math.) That part of arithmetic which treats of adding
numbers.
[1913 Webster]
4. (Mus.) A dot at the right side of a note as an indication
that its sound is to be lengthened one half. [R.]
[1913 Webster]
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.
[1913 Webster]
6. (Her.) Something added to a coat of arms, as a mark of
honor; -- opposed to abatement.
[1913 Webster]
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.
[1913 Webster]
Syn: Increase; accession; augmentation; appendage; adjunct.
[1913 Webster]
WordNet (r) 3.0 (2006):
addition
n 1: a component that is added to something to improve it; "the
addition of a bathroom was a major improvement"; "the
addition of cinnamon improved the flavor" [syn: addition,
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" [ant: deduction, 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: addition, 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, addition]
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 summation of four and three gives
seven"; "four plus three equals seven" [syn: summation,
addition, plus]