ADD
     n : a condition (mostly in boys) characterized by behavioral and
         learning disorders [syn: {attention deficit disorder}, {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, zise 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" [ant: {take
          away}]
     2: state or say further; "`It doesn't matter,' he supplied"
        [syn: {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" [syn: {lend}, {impart}, {bestow},
         {contribute}, {bring}]
     4: make an addition by combining numbers; "Add 27 and 49,
        please!" [syn: {add together}] [ant: {subtract}]
     5: determine the sum of; "Add all the people in this town to
        those of the neighboring town" [syn: {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"
Source: WordNet® 2.0

ADD
     Adapter Device Driver (OS/2)
     
     
Source: Virtual Entity of Relevant Acronyms