I am confused about the meaning of markedness. From the [Wikipedia](http://en.wikipedia.org/wiki/Markedness) page I read:

> 
> The dominant term is known as the 'unmarked' term and the other, secondary one is the 'marked' term. In other words, it is the characterization of a "normal" linguistic unit (i.e. the unmarked term) compared to the unit's possible "irregular" forms (i.e. the marked term).
> 
> 
> 

I believe that "dominant" means more frequent, but is it dominant inside one language or considering all natural languages together?