ADD

¹ American  

[ey-dee-dee] / ˈeɪˈdiˈdi /

abbreviation

1. attention deficit disorder: the inattentive subtype of ADHD, usually marked by distractibility and difficulties with executive function.

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add ² American  

[ad] / æd /

verb (used with object)

1. to unite or join so as to increase the number, quantity, size, or importance.

   to add two cups of sugar; to add a postscript to her letter;

   to add insult to injury.

   Synonyms:

   adjoin , attach , append , affix

2. to find the sum of (often followed byup ).

   Add this column of figures.

   Add up the grocery bills.

   Synonyms:

   sum , total

3. to say or write further.

4. to include (usually followed byin ).

   Don't forget to add in the tip.

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verb (used without object)

1. to perform the arithmetic operation of addition.

   children learning to add and subtract.

2. to be or serve as an addition (usually followed byto ).

   His illness added to the family's troubles.

noun

1. Journalism.  copy added to a completed story.

verb phrase

1. add up to  to signify; indicate.

   The evidence adds up to a case of murder.

idioms

1. add up,

   1. to make the desired, expected, or correct total.

      These figures don't add up right.

   2. to seem reasonable or consistent; be in harmony or accord.

      Some aspects of the story didn't add up.

ADD ¹ British  

abbreviation

1. attention deficit disorder

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add ² British  

/ æd /

verb

1. to combine (two or more numbers or quantities) by addition

2. to increase (a number or quantity) by another number or quantity using addition

3. to join (something) to something else in order to increase the size, quantity, effect, or scope; unite (with)

   to add insult to injury

4. to have an extra and increased effect (on)

   her illness added to his worries

5. (tr) to say or write further

6. to include

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noun

1. informal  an instance of adding someone to one's list of contacts on a social networking site, esp MySpace

   Thanks for the add!

ADD Scientific  

1. Abbreviation of attention deficit disorder

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Other Word Forms

• addable adjective
• addedly adverb
• addible adjective
• misadd verb
• readd verb (used with object)
• unaddable adjective
• unadded adjective
• unaddible adjective

Etymology

Origin of ADD¹

First recorded in 1975–80

Origin of add¹

First recorded in 1325–75; Middle English adden, from Latin addere, equivalent to ad- ad- + -dere “to put” (combining form; do ¹ )

Example Sentences

He added that he hoped more countries would follow the U.K.’s “constructive negotiations.”

From The Wall Street Journal

With a share price near $200, the company “is getting little if any credit for its business with OpenAI,” he added.

From MarketWatch

In an upside case, Amazon could add 5 gigawatts of capacity per year over the the next two years.

From MarketWatch

The startup’s cultural oddities have added to its allure.

From The Wall Street Journal

He adds that the technique could eventually guide the development of therapies for this neurodegenerative disorder.

From Science Daily

Related Words

• boost
• continue
• include
• reply