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add
While the term ADD, or attention-deficit disorder, has become increasingly popular among laypersons,
ADHD, or attention-deficit/hyperactivity disorder, is the only clinically diagnosed term for disorders characterized by inattention, hyperactivity, and impulsivity used in the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorder, Fourth Edition.
There are actually three different types of ADHD, each with different symptoms: predominantly inattentive, predominantly hyperactive/impulsive, and combined.
Some professionals use the term ADD to refer to the predominantly inattentive type of ADHD.
by Lorn A. W. August 14, 2004

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ADD
A disease every kid these days claims they have.
I have ADD. Me too. Me 3. Me 4. Fuck you.
by ass crust June 17, 2003

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ADD
A legitimate mental disability often viewed as a made up excuse for poor performance in school (which it frequently is.) It is natural for children to display signs of ADD, this does not however mean they are afflicted. It means they are normal, well-balanced human beings. Symptoms generally fade in the early teens; if by 15 an individual's condition persists or worsens, they may (but not always) be justly diagnosed. However, for those who genuinely suffer, the clarity of mind the medication can provide is priceless and worth irritating fakers who discredit the illness.
This is not a sign of stupidity; in fact, ADD frequently affects those with above average IQ's, such as Ivy League students, and many renowned geniuses throughout history. Though the occasional genuine moron and/or average thinker will fall victim.
A test of whether or not the condition is actual could be if the individual in question has difficulty focusing on the activities they enjoy as well as activities they dislike.
While his fellow students have learned to concentrate on assignments, Alex remains unable to focus on the simplest task.
by Clarity March 01, 2005

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ADD
To sum two or more numbers
When you add 4 and 5 you get 9
by Anonymous September 20, 2003

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ADD
Contrary to popular belief, it is not just a lame excuse for misbehaving children. While it is sometimes labeled as so by people who don't know what they are talking about, it is an actual disorder that has more effects besides misbehavior, including difficulty concentrating and restlessness, and should not be discounted amongst cynics with nothing better to do than whine on the internet.
I am a 16-year-old with ADHD that really does have difficulty concentrating who takes medication that does actually help, and is not called ritilin.
by Striddle February 16, 2005

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means, attention defisite dis OOO look at the pretty flowers
when you are talking to someone and then you get off topisnt it nic outside today?
by Cookie monster November 13, 2003

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ADD
Short for "attention deficit disorder." An entrepreneur-friendly affliction, which is often the catalyst for producing disruptive or revolutionary ideas.
Many geeks suffering from ADD may not have an easy time in school, but they are being gobbled up by innovative companies, in spite of their odd or antisocial behaviors.
via giphy
by MathPlus July 17, 2016

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