1.  A kenning is a poetic metaphor. For example, the fishes' bath means the sea.

2.  A word or phrase used by druids, bards, and poets to describe in highly symbolic language people, places, or things. (e.g. “the Plain of Tethra” is a kenning for the ocean. “The Cattle of the Plain of Tethra” is a kenning for fish and “The Man who tends the Plain of Tethra” is a kenning for a fisherman.)