Definition: The word "Mex" refers to the Mexican people in Latin America or Mexico, which is a country that spans across Central and South America. It can also be used as a colloquial term for a specific region or state located near Mexico. In terms of its definition, "Mex" seems to be a generic term for various ethnic groups living in Mexico, including the Aztecs, Mixtec, Oaxacan, Zapotec, and Totonac people. It's also possible that the word was used by Spanish conquistadors to refer to the indigenous peoples who inhabited this region. In Spanish-speaking countries, "Mex" is often used as a term for the state of Mexico, which has a large number of ethnic and cultural diversity within it.