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.
Ad*di"tion*al (&?;), a. Added; supplemental; in the way of an addition.
Ad*di"tion*al, n. Something added. [R.] Bacon.
Ad*di"tion*al*ly, adv. By way of addition.
Ad*di"tion*a*ry (&?;), a. Additional. [R.] Herbert.
Ad`di*ti"tious (&?;), a. [L. addititius, fr. addere.] Additive. [R.] Sir J. Herschel.
Ad"di*tive (&?;), a. [L. additivus.] (Math.) Proper to be added; positive; -- opposed to subtractive.
Ad"di*to*ry (&?;), a. Tending to add; making some addition. [R.] Arbuthnot.