from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mountain or rocky mass that has resisted erosion and stands isolated in an essentially level area. Also called inselberg.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hill or mountain standing isolated above a predominately flat plain.
from The Century Dictionary and Cyclopedia
- n. In physical geography, an isolated hill or mountain rising over a peneplain, and surviving because of the superior resistance of its rocks or of its distance from the larger rivers; a residual hill.
After Mount Monadnock, a peak of southwest New Hampshire.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the name of Mount Monadnock in New England, which derives from an Abenaki word, perhaps menonadenak, menonadenek ("smooth mountain") or menadenak, menadenek ("isolated mountain"), from aden ("mountain"). (Wiktionary)