[n] a beam laid along the ridge of a roof; provides attachment for upper end of rafters
[n] any long raised border or margin of a bone or tooth or membrane
[n] a long narrow natural elevation or striation
[n] a long narrow range of hills
[n] any long raised strip
[v] form into a ridge
[v] spade into alternate ridges and troughs, of soil
[v] through soil toward (a crop row) from both sides; "He ridged his corn"
[v] plough alternate strips by throwing the furrow onto an unploughed strip
[v] extend in ridges; "The land ridges towards the South"