Gagne's definition of gifted and talented, 2000

'Giftedness designates the possession and use of untrained and spontaneously expressed natural abilities (called aptitudes or gifts), in at least one ability domain, to a degree that places an individual among the top 10% of age peers. Talen designates the superior mastery of systematically developed abilities (or skills) and knowledge in at least one field of human activity, to a degree that places an individual within the top 10% of age peers who are (or have been) active in that field (p.67)

Gagne, F. (2000). Understanding the complex choreography of talent development through

DMGT-based analysis. In K.A. Heller, F.J. Monks, R.J. Sternberg, & R.F. Subotnik (Eds.), International handbook of giftedness and talent (2nd ed.)(p.67)