<p><strong>Noun</strong></p><ul><li>a long, narrow elevation of land; a chain of hills or mountains.</li><li>the long and narrow upper edge, angle, or crest of something, as a hill, wave, or vault.</li><li>the back of an animal.</li><li>any raised, narrow strip, as on cloth.</li><li>the horizontal line in which the tops of the rafters of a roof meet.</li><li>(on a weather chart) a narrow, elongated area of high pressure.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to provide with or form into a ridge or ridges.</li><li>to mark with or as if with ridges.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to form ridges.</li></ul>