Definition of "berg"

The ice was thin, and only a few areas had bergs large enough to support marine mammals.

1997, David J. Rugh with Kim E.W. Shelden, “Spotted Seals, Phoca Largha, in Alaska”, in Marine Fisheries Review, volume 59, number 1, page 1

There are in fact many such subterranean underways in Germany, speeding traffic beneath bergs, burgs and villages and into and around and under big city downtowns ...

2004, Alan Goldfein, “A Wonderful Drive”, in Europe's Macadam, America's Tar: How America Really Compares to "Old Europe"‎, American Editions, page 46