Mainstream is a term that usually refers to the common current of thought held by the majority, meaning that "mainstream" things are those that are currently popular with most people. It is most often applied in the arts (i.e., music, literature, and performance). This includes:

• something that is ordinary or usual;
• something that is familiar to most people;
• something that is available to the general public;
• something that has ties to corporate or commercial entities.