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

In addition, obesity appeared to influence the relationship between type 2 diabetes and dementia.

From Science Daily

In addition to spin polarizing half the fuels, the percentage of deuterium would be increased from the usual amount of roughly 60% or more.

From Science Daily

In addition to depressive symptoms, paranoid thoughts and unusual thought content were also associated with self-destructive thinking.

From Science Daily

In addition, the older generation increased by about 42,500 people, accounting for 37.1% of the total population.

From Science Daily

In addition to considering a single-family home, the research also examined how well the technology would work in the lobby of a small hotel, a medium-size office building, and hospital patient rooms.

From Science Daily

Related Words

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

More About Addition

What is a basic definition of addition?

Addition is a mathematical operation in which two or more numbers are combined to equal a greater number. The word addition also refers to the act of adding. More generally, it refers to an increase or boost applied to something. Addition has a few other senses as a noun.

Addition is one of math’s basic operations. Two or more numbers are united to result in a greater number, called a sum. The symbol used for addition is +, which is called a plus sign.

Real-life examples: Here are some basic examples of addition: 2 + 2 = 4, 17 + 35 = 52, 143 + 64 = 207.

Used in a sentence: I’m teaching the kids to use addition to figure out how much money they need to pay for lunch. 

An addition is something that has been joined or combined with something else to enhance it or provide more to it.

Real-life examples: Recipes can be improved or made more flavorful by using additions such as spices. Accessories and decorations are used as additions to things like cars or clothing to make them look nicer or more stylish.

Used in a sentence: Paintings and flowers make nice additions to any room. 

Relatedly, addition can refer to new rooms or wings that are attached to a building.

Used in a sentence: The college is planning a new addition to the campus library. 

Addition is also used to refer to the act or an instance of adding to something or increasing it in some way.

Used in a sentence: The roller coaster became much more popular after the addition of exciting music and amazing decorations.

Where does addition come from?

The first records of the word addition come from around 1350. It ultimately comes from the Latin additiōn-, which comes from the verb addere, meaning “to add.”

Did you know ... ?

What are some other forms related to addition?

• preaddition (noun)
• readdition (noun)

What are some synonyms for addition?

• adding
• enlargement
• bonus
• boost
• enhancement

What are some words that share a root or word element with addition? 

• add
• additional
• additament
• additive
• in addition

What are some words that often get used in discussing addition?

• math
• subtraction
• multiplication
• division
• operation
• increase
• house
• building

What are some words addition may be commonly confused with?

• edition

How is addition used in real life?

Addition is a common word used in the context of math and in general.

If anyone ever feels dumb, keep in mind I still use my calculator to do basic addition.

— tessfeller (@tessfeller) November 23, 2020

Huh, I didn't realize siu mai/siomai is a common Filippino dish. Fascinating to see all the variations with additions of jicama, citrus and a chicken variation.

— Karon Liu (@karonliu) November 18, 2020

Every two years I reassess my bridesmaid list. Some upgrades, some cuts, some additions (bigger budget)

— Angela Trimbur (@angelatrimbur) March 27, 2016

 

 

Try using addition!

Is the following math problem an example of addition?

5 x 6 = 30