The Frontier in the
United States and
Canada was the zone of unsettled land to the
west of the original settlements. As settlement occurred the frontier moved west and by about
1890 ceased to exist when the
Pacific shore was reached. The frontier by official definition of the
census was a line west of which the population was less than 2 persons per
square mile. The frontier was very productive of both adventures and stories.
Western movies are generally set on the frontier.
Compare The West (U.S.) and Wild West.