\ri-'tärd\ vb : to hold back : delay the progress of.

Or probably what you actually looked the word up for:

adj. : slow or limited in intellectual, emotional, or academic progress.
Often times, retard is used as a slur. That's probably why you looked this up, but I thought it'd be funny to give an actual definition to it as well. So yeah, you learned something! It's not always a slur, sometimes it's used to mean something else, too. But under those contexts, it's best to use "slow" or "delay" as opposed to this word, due to the negative connotation this word holds bu default.
by Magic kitty April 9, 2022
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1) to be slow( in mind)
2) the proper word for deseleration as oppose to acceleration
1) no comment for the word retardation
2) used in distance- time graphs
by Ajn0007 June 27, 2009
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It means "very stupid" but in a more hilarious, weird, and/or spontaneous way. From the Latin word for "slow".

If you want to tick off a politically correct person, just say it. They think it's mean because people with mental problems are not always stupid, except you can't call those people "retarded" in the first place, and nobody cares anyway. Plus, once again, it's from the Latin word for "slow".
*Guy 1 is dancing very strangely.*
Guy 2 to Guy 3: Look at Guy 1 dancing like he's retarded.
by Morshu34576345624555555 October 21, 2013
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(a.k.a. R-word)
Adjective:
1. Used to describe someone less mentally and/or physically developed than others of their age. This term is now considered derogatory. (Also can be used as a noun.)
2. A generic insult or emphasis to describe how stupid/appalling/etc. something or someone is.

Verb:
3. To have been slowed down/delayed.
1. This student is mentally retarded, so he is in a different class.
2. This movie was so retarded! The acting, story, and special effects sucked!
3. The famine retarded the growth of population.
by AFN7 December 25, 2015
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To be tarded twice..
John who is tarded.. is now retarded
by Rob March 15, 2004
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A retarded person or "Retard" is someone that has been exposed to idiotidis.
The Retard: Hey, how are you?
Jeff: I'm good
The Retard: Don't you like Sonic and Shadow
Jeff: Yeah there pretty cool
The Retard: Man I wish hedgehogs were real.
by GrahamCrackers123 January 29, 2017
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1. Word used to describe someone who is stupid and NOT someone who suffers from a mental disability. You can use it to describe a person who has a fully formed brain, but keeps fucking up.
2. Only an ignorant jackass would call someone who is mentally handicapped a retard.
3. Only a retard (see above) would be upset simply by the use of the word retard.
Sarah Palin is a retard; her son Trig is not.
by Get_It_Straight December 10, 2010
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