World music is a term that covers all music that is not part of mainstream pop music or classical music and has some kind of "ethnic" component. The connotation of the term is pop music from the third world, European pop music that uses influences from the third world, and traditional music especially but not only from the third world. The term is used primarily as a marketing/classificatory device, sometimes referring to any kind of foreign music, especially in a foreign language. Obviously, the various kinds of ethnic music that are included under the rubric "world music" do not have anything in common genetically or musically in virtue of which they are called "world music."
... out with 28.2% under the age of 18, 7.5% from 18 to 24, 33.5% from 25 to 44, 23.9% from 45 to 64, and 6.9% who are 65 years of age or older. The median age is 34 years. ...