/ rɪdʒ; NAmE / noun , verb
■ noun
1.
a narrow area of high land along the top of a line of hills; a high pointed area near the top of a mountain :
walking along the ridge
the north-east ridge of Mount Everest
2.
a raised line on the surface of sth; the point where two sloping surfaces join :
The ridges on the soles of my boots stopped me from slipping.
the ridge of the roof
—picture at house
3.
[ C ] ridge (of high pressure) ( technical ) a long narrow area of high pressure in the atmosphere
—compare trough
■ verb
[ vn ] [ usually passive ] to make narrow raised lines or areas on the surface of sth
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WORD ORIGIN
Old English hrycg spine, crest , of Germanic origin; related to Dutch rug and German Rücken back.