- a disability, as mental retardation or cerebral palsy, that begins at an early age and continues indefinitely, leading to substantial handicap.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- A cognitive, emotional, or physical impairment, especially one related to abnormal sensory or motor development, that appears in infancy or childhood and involves a failure or delay in progressing through the normal developmental stages of childhood.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A mental or physical disability, such as cerebral palsy or mental retardation, that is present during childhood, interferes with normal physical, intellectual, or emotional development, and usually lasts throughout life.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.