What defines that whether a baby/a kid has excellent intelligence? What are the characteristics?

I reckon there are no specific definitions but you can look out for certain signs that might indicate that your child has excellent intelligence or is gifted. Here are some characteristics that are easy to look out for: - Very fast in understanding ideas and concepts. Unusually fast in seeing relationships and patterns in objects and ideas. - Likes to be precise and perfect, thus likes to correct errors and argues a lot. - High degree of ability to think abstractly and in metaphors and symbols at an early age. - Appreciates complexity, and has the ability to see many sides to an issue or problem. - Fast learner, usually in great leaps. - Very good memory. - Early/avid reader, and loves reading - Vivid imagination (from; http://www.raisesmartkid.com/all-ages/1-articles/7-characteristics-of-a-gifted-child)