monadnock An isolated hill or range of hills standing above the general level of a peneplain, which results from the erosion of the surrounding terrain. It may be located on relatively resistant rock or in a watershed position where erosion is least. It is named after Mount Monadnock, New Hampshire, USA.

monadnock Isolated hill or range of hills standing above the general level of a peneplain and resulting from the erosion of the surrounding terrain. It may be located on relatively resistant rock or in a watershed position where erosion is least. It is named after Mount Monadnock, New Hampshire, USA.