0 a hollow area almost surrounded by steep slopes at the top of a glaciated valley, especially in the Welsh mountains:
My eyes were drawn up and across the cwm to the giant cliffs of Lliwedd soaring up to jagged summits.
Finally we breasted the saddle in the lower ridge, what in the Welsh mountains we would call the cwm.
This was the approach for the early climbing expeditions, who knew this as the North Cwm.
This long thin lake has formed in a cwm about one-third of the way up the mountain.
A number of superstitions are connected with the cwm, which has also been the site of a number of small aeroplane crashes.
A deep, narrow valley is known as a cwm (also spelled "combe" or "coombe").
