Mastiff type means a large molosser dog. The term "mastiff type" has been used synonymously with the term "molosser". For example, the bulldog breeds, the Great Dane, mountain dogs, pit bulls and even smaller dogs such as the Boston terrier, may be considered "mastiff types" in this broad sense. The descriptive term, mastiff type, should not be confused with the breed, the Mastiff. All breeds are individual and should be referred to by their breed name to ensure correct identification.
This article uses material from the Wikipedia article "Mastiff", which is released under the Creative Commons Attribution-Share-Alike License 3.0.