Definition of Addition

1. Noun. A component that is added to something to improve it. "The addition of cinnamon improved the flavor"

Exact synonyms: Add-on, Improver
Specialized synonyms: Additive, Afterthought, Annex, Annexe, Extension, Wing, Attachment, Elongation, Extension
Generic synonyms: Component, Constituent, Element
Derivative terms: Add On, Add, Improve

2. Noun. The act of adding one thing to another. "The addition of a leap day every four years"
Generic synonyms: Increase, Step-up
Specialized synonyms: Retrofit, Fluoridation, Fluoridisation, Fluoridization
Derivative terms: Add
Antonyms: Subtraction

3. Noun. A quantity that is added. "They recorded the cattle's gain in weight over a period of weeks"
Exact synonyms: Gain, Increase
Generic synonyms: Indefinite Quantity
Specialized synonyms: Accretion
Derivative terms: Increase, Increase

4. Noun. Something added to what you already have. "He was a new addition to the staff"
Exact synonyms: Accession
Generic synonyms: Acquisition

5. Noun. A suburban area laid out in streets and lots for a future residential area.
Generic synonyms: Suburb, Suburban Area, Suburbia

6. Noun. The arithmetic operation of summing; calculating the sum of two or more numbers. "Four plus three equals seven"
Exact synonyms: Plus, Summation
Generic synonyms: Arithmetic Operation
Derivative terms: Add, Add, Sum, Summational

Definition of Addition

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

Definition of Addition

1. Noun. The act of adding anything. ¹

2. Noun. Anything that is added. ¹

3. Noun. The arithmetic operation of adding. ¹

¹ Source:

Definition of Addition

1. something added [n -S]

Medical Definition of Addition

1. 1. The act of adding two or more things together; opposed to subtraction or diminution. "This endless addition or addibility of numbers." 2. Anything added; increase; augmentation; as, a piazza is an addition to a building. 3. That part of arithmetic which treats of adding numbers. 4. A dot at the right side of a note as an indication that its sound is to be lengthened one half. 5. 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. Something added to a coat of arms, as a mark of honor; opposed to abatement. Vector addition, that kind of addition of two lines, or vectors, AB and BC, by which their sum is regarded as the line, or vector, AC. Synonym: Increase, accession, augmentation, appendage, adjunct. Origin: F. Addition, L. Additio, fr. Addere to add. Source: Websters Dictionary (01 Mar 1998)

Addition Pictures

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Lexicographical Neighbors of Addition

adding machine
adding up
addisonian anaemia
addisonian crisis
addisonian syndrome
addition (current term)
addition-deletion mutation
addition compound
addition mutation
addition polymer
addition polymerisation
addition polymerization
addition reaction

Literary usage of Addition

Below you will find example usage of this term as found in modern and/or classical literature:

1. Pelicotetics, Or, The Science of Quantity: Or, The Science of Quantity. An by Archibald Sandeman (1868)
"... Whence calling addition to a minus quantity of a plus quantity minus addition of or minus addition to according as the latter quantity or the absolute ..."

2. Journal of the American Chemical Society by American Chemical Society (1879)
"Thus, addition to 3-hexyne can be initiated by attack at either of the two equivalent acetylenic carbon atoms while attack on ..."

3. Science by American Association for the Advancement of Science (1904)
"The ' normal weight ' of sugar is dissolved and diluted to 100 cubic centimeters and the solution clarified by the addition of pulverized anhydrous ..."

4. Elementary algebra by James Hamblin Smith (1870)
"I. addition AND SUBTRACTION.. ALGEBRA is the science which teaches the use of SYMBOLS to denote numbers and the operations to which numbers may be subjected ..."

5. Money and Morals: A Book for the Times by John. Lalor (1852)
"In any case, there is a new piece of positive capital created, as an addition to the pre-existing stock of absolute paying power. ..."

6. Science by American Association for the Advancement of Science (1899)
"We learn that, in addition to the usual University instruction in morphology, physiology, ecology, etc., especial attention will be given to the botanical ..."

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