National Association for Gifted Children (NAGC)

“Gifted individuals are those who demonstrate outstanding levels of aptitude (defined as an exceptional ability to reason and learn) or competence (documented performance or achievement in top 10% or rarer) in one or more domains. Domains include any structured area of activity with its own symbol system (e.g., mathematics, music, language) and/or set of sensorimotor skills (e.g., painting, dance, sports).” 

Texas Education Code

“Gifted and talented student” means a child or youth who performs at or shows the potential for performing at a remarkably high level of accomplishment when compared to others of the same age, experience or environment and who:

• exhibits high-performance capability in an intellectual, creative or artistic area;
• possesses an unusual capacity for leadership; or
• excels in a specific academic field.

This definition is now codified in The Texas State Plan for the Education of Gifted/Talented Students (Texas Education Agency, 2009), it is the basis for identification and services that must be provided for gifted and talented students in Texas.