·noun A ridge or pile of ice on an ice field.
II. Hummock ·noun Timbered land. ·see Hammock.
III. Hummock ·noun A rounded knoll or hillock; a rise of ground of no great extent, above a level surface.
A hill with a rounded summit or conical eminence on the sea-coast. When in pairs they are termed pap...
The Sailor's Word-Book