n.

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

v.

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
2. state or say further;
   append, supply
   
   • `It doesn't matter,' he supplied
3. bestow a quality on;
   lend, impart, bestow, contribute, bring
   
   • 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
4. make an addition by combining numbers;
   add together
   
   • Add 27 and 49, please!
5. determine the sum of;
   total, tot, tot up, sum, sum up, summate, tote up, add together, tally, add up
   
   • Add all the people in this town to those of the neighboring town
6. constitute an addition
   
   • This paper will add to her reputation