How do you define "Intelligence"

This is something I thought about when reading that IQ thread. Seems some people base intelligence off of academics, and test scores.

I personally believe intelligence isn't what you learn in school, but rather what you learn in life in general. Experience. The reason I say this is because some people have an aptitude for school. I know I didn't. Some could sit, learn, study, do homework, ace tests, get A's, and be deemed more intelligent than those who didn't. Some kids didn't care, flunked out, but were still just as intelligent as those with the A's.

My belief is intelligence is based off of experience, and how you learn, and apply that experience for future use. Not memory recall. Sure you can be a science "genius", but does that mean you'd have the aptitude to start a business and build it into an empire from the ground up? Not at all. So intelligence shouldn't be based merely on a scale, such as an IQ test. Some people are terrible at tests, get nervous and flunk. Doesn't mean they aren't intelligent individuals. Everyone is a genius at something, I find IQ testing unfair in that matter because they only test in certain categories.