For Kinfolk, Rachel Eva Lim interviewed Yale researcher, Mei Tan, about creativity and it’s great:
How do you scientifically define creativity?
We define it as a set of skills that allow an individual to produce something that’s both novel [original] and task-appropriate [useful]. It can be argued that originality and usefulness may vary depending on situations and cultures, so therefore a universal measuring stick for creativity would be impossible.
I love that definition. Creativity is a combination of originality and usefulness; something unique and something helpful.