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Synonyms

add

1 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.


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 2 American  
[ey-dee-dee] / ˈeɪˈdiˈdi /

abbreviation

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


ADD 1 British  

abbreviation

  1. attention deficit disorder

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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!

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
ADD Scientific  
  1. Abbreviation of attention deficit disorder


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

Origin of ADD2

First recorded in 1975–80

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Prompts are written instructions designed to steer a model's output without retraining it or adding new data.

From Science Daily

“The presence of these fossils in Colorado suggests that archaic primates originated in the north and then spread southward, diversifying soon after the mass extinction at the end of the Cretaceous Period,” adds Dr. Chester.

From Science Daily

Rarely used in jewelry, the dark navy of sodalite adds an unexpected layer of depth to Color Blossom’s existing luminous gemstone lineup.

From Los Angeles Times

“The big-screen environment takes it to the next level. Audiences of all ages can immerse themselves in these incredible performances, and doing so with friends, family, and a full theater makes it unforgettable,” Federoff added.

From Los Angeles Times

“Elections should be free from fraud or any other malfeasance that subverts the will of the people,” she added.

From Salon