1》 a long, narrow hilltop, mountain range, or watershed.
↘the edge formed where the two sloping sides of a roof meet at the top.
2》 a narrow raised band on a surface.
↘a raised strip of arable land, especially one of a set separated by furrows.
3》 Meteorology an elongated region of high barometric pressure.
■ verb [often as adjective ~d ] mark with or form into ~s.
OE hrycg 'spine, crest', of Gmc origin.