When I first looked at this word, I immediately thought of being smart because smart is a synonym of intelligence. But then you have to define what smart means.
I think the word intelligence means knowing a certain subject really well and use what you already know to make connections and conclusions. EX: " If I know blah and blah is blah, then at the end the result would be _____" It means to think out side the box. The reason why I said a "certain subject" is because there are many types of intelligence. There are creative intelligence, musical, linguistic, naturalist and etc etc. Just like how there different types of "smarts", like street smart or book smart.