add meaning and definition

ADD noun

Definition of ADD (noun)

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

ADD verb

Definition of add (verb)

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"
   • antonym: take away
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: bestow, bring, contribute, impart, lend
4. make an addition by combining numbers
   • "Add 27 and 49, please!"
   • synonyms: add together
   • antonym: deduct
5. determine the sum of
   • "Add all the people in this town to those of the neighboring town"
   • synonyms: add together, add up, sum, sum up, summate, tally, tot, tot up, total, tote up
6. constitute an addition
   • "This paper will add to her reputation"