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Definition of 'add'


  1. a condition (mostly in boys) characterized by behavioral and learning disorders
       Synonyms: attention deficit disorder attention deficit hyperactivity disorder ADHD hyperkinetic syndrome minimal brain dysfunction minimal brain damage MBD


  1. make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of; "We added two students to that dorm room"; "She added a personal note to her letter"; "Add insult to injury"; "Add some extra plates to the dinner table"
       Antonyms: take away take out
  2. state or say further; "`It doesn't matter,' he supplied"
       Synonyms: append supply
  3. bestow a quality on; "Her presence lends a certain cachet to the company"; "The music added a lot to the play"; "She brings a special atmosphere to our meetings"; "This adds a light note to the program"
       Synonyms: lend impart bestow contribute bring
  4. make an addition by combining numbers; "Add 27 and 49, please!"
       Synonyms: add together
       Antonyms: subtract deduct take off
  5. determine the sum of; "Add all the people in this town to those of the neighboring town"
       Synonyms: total tot tot up sum sum up summate tote up add together tally add up
  6. constitute an addition; "This paper will add to her reputation"

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