add

v. supplement; sum, add numbers together; conclude, summarize

neurological disorder characterized by lack of attention and inability to control behavior as a result of difficulty in processing stimuli and sometimes characterized by hyperactivity (often diagnosed in children)

term describing the digital process of creating an audio CD

condition in which one is unable to use an apostrophe

(Agriculture and forensic anthropology) figure calculated by summer temperature

ADD is a three-letter acronym that may refer to:Attention-Deficit Disorder, a developmental disorder that impairs one's ability to keep focusedAdderley Park railway station, United Kingdom, from its National Rail codeAdministration on Developmental Disabilities, of the United States Administration for Children and FamiliesAdvanced Dungeons & DragonsAng Dating Daanan assembly language computer instruction to add two numbers.Bole International Airport, Addis Ababa, Ethiopia, from its IATA airport code.a SPARS Code indicating that a CD was recorded in analog, and was mixed/edited and mastered in digital."A.D.D." (American Dream Denial) is the title of a song on System of a Down's album Steal This Album!A.D.D. (album) (Audio Day Dream), the first studio album by Blake Lewis, the runner-up on the sixth season of American IdolA.D.D. Marketing and Advertising, a Los Angeles Based agency founded in 1992Automatic Death DiseaseADD2 (Advanced Digital Display 2), a designation for Intel SDVO adapter cardsAccumulated degree days, calculated by summing average daily temperatures and used to determine the state of temperature dependent processes, usually biological
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ADD abbr. attention deficit disorder Attention deficit disorder. Disorder characterized by a short attention span, impulsivity, and in some cases [more]ADD - Community and Resources

Noun
1. a condition (mostly in boys) characterized by behavioral and learning disorders
(synonym) attention deficit disorder, attention deficit hyperactivity disorder, ADHD, hyperkinetic syndrome, minimal brain dysfunction, minimal brain damage, MBD
(hypernym) syndrome
(part-meronym) hyperactivity

Verb
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"
(antonym) take away, take out
(hypernym) increase
(hyponym) modify, qualify
(derivation) addition
2. state or say further; "`It doesn't matter,' he supplied"
(synonym) append, supply
(hypernym) state, say, tell
(hyponym) slip in, stick in, sneak in, insert
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"
(synonym) lend, impart, bestow, contribute, bring
(hypernym) change, alter, modify
(hyponym) instill, transfuse
(derivation) addition, add-on, improver
4. make an addition by combining numbers; "Add 27 and 49, please!"
(synonym) add together
(antonym) subtract, deduct, take off
(hypernym) calculate, cipher, cypher, compute, work out, reckon, figure
(hyponym) foot, foot up
(see-also) total, number, add up, come, amount
(verb-group) total, tot, tot up, sum, sum up, summate, tote up, add together, tally, add up
(derivation) summation, addition, plus
(classification) arithmetic
5. determine the sum of; "Add all the people in this town to those of the neighboring town"
(synonym) total, tot, tot up, sum, sum up, summate, tote up, add together, tally, add up
(hypernym) count, number, enumerate, numerate
(verb-group) add together
(derivation) summation, addition, plus
6. constitute an addition; "This paper will add to her reputation"
(hypernym) form, constitute, make

ADD (Analog-Digital-Digital), term describing the digital process of creating an audio CD