I know this isn't the technical definition from any official standpoint, but I personally define gifted as a minimum of 99th percentile on a standardized test.
So, are you talking about an achievement test here? To play devil's advocate:
Would any kid who, say, hit the 99th percentile once on any achievement test be gifted? How about if he is in the 99th percentile locally but the local area is very low performing? What if he was in the 99th percentile once and then generally tracked around the 90th or 95th or even the 75th most of the time? What if he legitimately had a high average IQ (let's say 115), but was a hard worker and/or higher performer than that?
How about the opposite: What if he legitimately had a sky high IQ but was 2e and rarely or never achieved at the 99th percentile? Would that kid still be gifted?
