"the North-East ridge of Everest"

• the line or edge formed where the two sloping sides of a roof meet at the top

  "the roof was unusual due to the relative heights of the eaves and the ridge"

• a narrow raised band on a surface

  "buff your nails in order to smooth ridges"

• a raised strip of arable land, especially (in medieval fields) one of a set separated by furrows

  "a path led through the ridges and furrows of fields long left to nature"

"a high-pressure ridge helping to steer cyclones further south"

"a field ploughed in narrow stretches that are ridged up slightly"

• (of a surface) form into or rise up as a ridge

  "the crust of the earth ridged"