Dyslexia refers to specific reading difficulty in a person with adequate vision and at least average skills in other academic areas; difficulty/disorder in deciphering, reading, and comprehending text not due to low intelligence.
It is, likewise, a learning disorder in which the individual omits, distorts, or substitutes words when reading and reads in a slow, halting fashion. It is a specific reading difficulty in a person with adequate vision and at least average skills in other academic areas; a reading disorder characterized by problems such as letter reversals, mirror reading, slow reading, and reduced comprehension. Dyslexia is from the Greek words "dys", meaning "bad," and "lexikon" meaning "of words".
Other /More definition:
Dyslexia refers to the disorder of reading not due to low intelligence.