n. A mountain top or rocky element of a ridge that is surrounded by glacial ice but is not covered by ice; a peak protruding from the surface ice sheet.
the GNU version of the Collaborative International Dictionary of English
n. In Greenland, an insular hill or mountain surrounded by an ice sheet.
The Century Dictionary and Cyclopedia
n. A crest or ridge of rock appearing above the surface of the inland ice in Greenland.
Word Usage
"At Merger, a "nunatak" or rocky peak sticking out of the ice, the only evidence of a visit by U.S. scientists in 1975 is a tiny metal stake covered by a pile of rocks."