Mounthill Posted in M Best definition Mounthill A mix between a Small mountain, and Large Hill. Usually found in areas where mountains and hills are common terrain (i.e. Utah, Colorado, CANADA, Wyoming, Idaho,) today i climbed the mounthill in my backyard. How satisfied are you with the definition? Looking for Mounthill meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 63 times.