Personally, I think the first Google dictionary definition works best for me:
1. the ability to acquire and apply knowledge and skills.
(The second is "the collection of information of military or political value.")
Maybe your talent lies in acquiring and applying academic knowledge. Maybe it's acquiring and applying social knowledge. Maybe it's athletic knowledge, or practical knowledge. Or some combination of any number of them. You can also possess greater or lesser ability, within your particular talent.
One of my particular strengths, for example, is vocabulary. I pick up new words easily, and have no difficulty remembering them. I'm good at digging them up, when I need them.
My husband's strength, conversely, is math. He can do calculations in his head, with a speed and fluency I'll never be able to match. And I tutor kids in math, so I'm working with numbers regularly!
Our son spends a good portion of his time analyzing the people around him, and does it frighteningly well. He's also one of the funniest people I know - an observer of the human condition. I really do think he could go into stand up comedy.
And then there's our daughter, who seems to have inherited all of our combined academic talents. Elementary school was a bit lonely, but university is working out fantastically for her with internships and scholarships, etc. She's what most people consider your classic "genius" - academic, bookish, logical, reserved. (Except that "genius" is what you do, not what you are, and as an undergrad she has yet to make any significant contribution to her field. But I absolutely think it's possible she'll do it, some day!)
There's a huge variety of different kinds of intelligences. Where we get in trouble is when we try to order them into some kind of hierarchy, labeling any one as more significant or more worthy of admiration than another.