Hummock

1. n. Timbered land. See Hammock.
2. n. A rounded knoll or hillock; a rise of ground of no great extent, above a level surface.
3. n. A ridge or pile of ice on an ice field.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.