...Defined: The use of imagination or original ideas, especially in the production of an artistic work.
It takes many different forms - writers of poetry, fiction, music, songs, composers, craftiness with any medium from paint to wood to whatever strikes the artist's fancy, cooking, baking.
Whatever strikes the artist's fancy.
I like to think that we all have an artist inside of us - whether we're in touch with that artist or not. Creativity isn't confined to just what I've listed above - there are so many ways to be creative, listing them all would be impossible. Just because one can't draw/paint, doesn't mean that one can't create a beautiful picture to be enjoyed by others. No, writers use words to draw/paint verbal pictures, for example.
Creativity is limitless. Tackle it, welcome it with open arms, chase it with a club - just accept it and make it uniquely yours.