Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Often Offensive Affected with mental retardation.
  • adj. Occurring or developing later than desired or expected; delayed.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. Simple past tense and past participle of retard.

from the GNU version of the Collaborative International Dictionary of English

  • n. having a limited or below normal mental ability; same as mentally retarded; -- used especially in relation to performance in academic tasks.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relatively slow in mental or emotional or physical development
  • n. people collectively who are mentally retarded

Etymologies

From retard +‎ -ed. (Wiktionary)

Examples

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