Often associated with a program. Add-on refers to an additional feature not included in the inital release, available later usually as a download.
The new Internet Explorer add-on allows you to permanently highlight text in yellow so you can see important information.
by ADB October 12, 2003
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A strap-on for a female computer. Mispronunciation of hardon.
I got an add-on in PC world.
by Delusional October 08, 2003
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A button that when pressed, creates a paradox that crash the whole dictionary
Thanos shriveled the timestone into pieces because the "add it" button created better paradoxes
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A mental disorder affecting many Americans. Symptoms include: becoming easily distracted, problems keeping focus in conversations, blurting out, frequent careless mistakes, avoiding tasks that require sustained mental effort (homework, studying, etc), giving effortless and undivided attention to topics the subject enjoys.

Many critics to the ADD diagnosis say patients are lazy, dumb, bored, and helpless. These people are idiots that fail to realized diversity in our population. They believe that because they can concentrate on tasks that need to be accomplished, everyone else can/should too. They say that people with ADD are lazy and no one likes doing boring daily tasks. They are right in that no one likes doing them, they are wrong in that some people simply can not focus enough to do so.

Everyone has problems. Whether it be mental, physical, etc. Saying a person with ADD is looking for an excuse is like saying a person with an handicap only has one for the sweet parking spot. I will admit, many people take ADD medication for the 'high' they receive, and this is wrong. But MANY drugs are abused, and people that truely have ADD shouldn't be punished. More understanding should be given to people that have been DIAGNOSED with ADD.
Ahhhhh crap, I really have ADD and can't focus on a day-to-day basis without my medicine. I have good days and bad days, but with my medicine I have continued focus. Thank you to whoever created this medicine that allows me to function on a 'normal' level daily.
by Add in Iowa April 15, 2006
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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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A MMORPG word used to tell other players that a player has picked up a few bad guys and they are following him/her to their location. It is a way of telling others that your bringing in the nasties. You are coming in hot.
Player 1: "I coming in with adds!"
Player 2: "How many?"
Player 1: "The whole HORDE!"
by The Green Griffon June 12, 2009
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