(1):
(n.) Anything added; increase; augmentation; as, a piazza is an addition to a building.
(2):
(n.) The act of adding two or more things together; - opposed to subtraction or diminution.
(3):
(n.) That part of arithmetic which treats of adding numbers.
(4):
(n.) A dot at the right side of a note as an indication that its sound is to be lengthened one half.
(5):
(n.) 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):
(n.) Something added to a coat of arms, as a mark of honor; - opposed to abatement.