addition

[ uh-dish-uhn ]

noun

1. the act or process of adding or uniting.
2. the process of uniting two or more numbers into one sum, represented by the symbol +.
3. the result of adding.

   Synonyms: accession, increment, enlargement, increase

4. something added.

   Synonyms: appendix, supplement, accession, increment, enlargement, increase

5. a wing, room, etc., added to a building, or abutting land added to real estate already owned.
6. Chemistry. a reaction in which two or more substances combine to form another compound.

addition

/ əˈdɪʃən /

noun

1. the act, process, or result of adding
2. a person or thing that is added or acquired
3. a mathematical operation in which the sum of two numbers or quantities is calculated. Usually indicated by the symbol +
4. a part added to a building or piece of land; annexe
5. obsolete.
   a title following a person's name
6. in addition
   adverb also; as well; besides
7. in addition to
   preposition besides; as well as

addition

/ ə-dĭsh′ən /

1. The act, process, or operation of adding two or more numbers to compute their sum.

Other Words From

• pread·dition noun
• read·dition noun

Word History and Origins

Origin of addition¹

First recorded in 1350–1400; Middle English addicio(u)n, from Latin additiōn-, stem of additiō, from addit(us) “added” (past participle of addere “to add”; add ) + -iō -ion

Word History and Origins

Origin of addition¹

C15: from Latin additiōn-, from addere to add

Idioms and Phrases

Idioms

1. in addition to, as well as; besides:

   In addition to directing the play, she designed most of the scenery.

More idioms and phrases containing addition

see in addition .

Synonym Study

Addition, accessory, adjunct, attachment mean something joined onto or used with something else. Addition is the general word, carrying no implication of size, importance, or kind, but merely that of being joined to something previously existing: an addition to an income, to a building, to one's cares. An accessory is a subordinate addition to a more important thing, for the purpose of aiding, completing, ornamenting, etc.: accessories to a costume. An adjunct is a subordinate addition that aids or assists a main thing or person but is often separate: a second machine as an adjunct to the first. An attachment is an accessory part that may be easily connected and removed: a sewing machine attachment for pleating.

Example Sentences

But I don’t think any of this negates what exists in live concerts — it’s in addition to those offerings.

From Los Angeles Times

In addition to the fine, it has ordered Meta to stop imposing these conditions on other services.

From BBC

Fox also promised to broadcast all 17 races on linear television in addition to coverage on its Spanish-language cable network, Fox Deportes.

From Los Angeles Times

The team has just two seniors in addition to three players who plan to redshirt in hopes of a larger role next season.

From Los Angeles Times

On the new season of the PBS children’s series, debuting Aug. 14, fans of ‘Mister Rogers’ Neighborhood’ will recognize the latest addition to the cast.

From Los Angeles Times

Related Words

• bonus
• boost
• enhancement
• expansion
• extension
• supplement