1. Enhanced reading skill; used to describe the trait in patients with various developmental disorders.
2. The presence of an advanced ability to read compared to the ability to understand spoken language.

Children with hyperlexia have a precocious ability to read words, far above what would be expected at their chronological age or they hav an intense fascination with letters or numbers. They tend to have significant difficulties in understanding verbal language, abnormal social skills, difficulty in socializing, and interacting appropriately with people.