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

  • n. A learning disorder marked by impairment of the ability to recognize and comprehend written words.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A learning disability in which a person finds it difficult to read and write.

from the GNU version of the Collaborative International Dictionary of English

  • n. an impaired ability to read.

from The Century Dictionary and Cyclopedia

  • n. See the extract.

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

  • n. impaired ability to learn to read


New Latin : dys- + Greek lexis, speech (from legein, to speak; see leg- in Indo-European roots).
(American Heritage® Dictionary of the English Language, Fourth Edition)
Circa 1890, from New Latin dys- + lexia, from Ancient Greek δυσ- (dys-) expressing the idea of difficulty, and Ancient Greek λέξις (lexis, "diction”, “word"). (Wiktionary)



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