ridgen.[OE. rigge the back, AS. hrycg; akin to D. rug, G. rcken, OHG. rucki, hrukki, Icel. hryggr, Sw. rugg, Dan. ryg. 16.]1. The back, or top of the back; a crest.(Hudibras.)2. A range of hills or mountains, or the upper part of such a range; any extended elevation between valleys.(Shak.)Part rise crystal wall, or ridge direct. (Milton.)3. A raised line or strip, as of ground thrown up by a plow or left between furrows or ditches, or as on the surface of metal, cloth, or bone, etc.()4. (Arch.) The intersection of two surface forming a salient angle, especially the angle at the top between the opposite slopes or sides of a roof or a vault.()5. (Fort.) The highest portion of the glacis proceeding from the salient angle of the covered way.(Stocqueler.)v. t.1. To form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.()Bristles ranged like those that ridge the back
Of chafed wild boars. (Milton.)2. To form into ridges with the plow, as land.()3. To wrinkle.(Cowper.)