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 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.
