addition

Addition is the mathematical operation of combining or adding two numbers to obtain an equal simple amount or total. Addition also provides a model for related processes such as joining two collections of objects into one collection. Repeated addition of the number one is the most basic form of counting.
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n. addition, act of joining one thing to another; basic mathematical operation in which separate numbers are brought together into one total sum; augmentation, supplement, something added

n. addition, sum; bill, check; reckoning; summary, summing up; tab

(n.)
The act of adding two or more things together; -- opposed to subtraction or diminution.
  

(n.)
That part of arithmetic which treats of adding numbers.
  

(n.)
Something added to a coat of arms, as a mark of honor; -- opposed to abatement.
  

(n.)
Anything added; increase; augmentation; as, a piazza is an addition to a building.
  

(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.
  

(n.)
A dot at the right side of a note as an indication that its sound is to be lengthened one half.