- The definition of addition is the process of bringing two or more numbers or things together.
Calculating the sum of 25 and 60 is an example of addition.
A child does addition problems on the blackboard.
- an adding of two or more numbers to get a number called the sum
- a joining of a thing to another thing
- a thing or part added; increase; specif., a room or rooms added to a building
- Law an identifying title or mark of status after a person's name (Ex.: John Smith, Esq.)
Origin of additionMiddle English addicion ; from Old French addition ; from Classical Latin additio ; from addere: see add
in addition (to)
- Mathematics a. The operation that, for positive integers, consists of increasing by a definite number of increments of 1. The operation is extended to other numbers according to the additive properties of positive integers and other algebraic properties.b. Any of certain analogous operations involving mathematical objects other than numbers.
- The process of adding or joining something to something else, typically to make it larger: The addition of a porch to the house would increase its resale value.
- Something added: This painting would make a fine addition to the museum's collection.
Origin of additionMiddle English, from Old French, from Latin additiō, additiōn-, from additus, past participle of addere, to add; see add.
(countable and uncountable, plural additions)
- (uncountable) The act of adding anything.
- The addition of five more items to the agenda will make the meeting unbearably long.
- Anything that is added.
- (uncountable) The arithmetic operation of adding.
- (music) A dot at the right side of a note as an indication that its sound is to be lengthened one half.
- (law) A title annexed to a person's name to identify him or her more precisely, as in "John Doe, Esq.", "Robert Dale, Mason", "Thomas Way, of New York".
- (heraldry) Something added to a coat of arms, as a mark of honour; opposed to abatement.