Definitions of ridge:

• noun:   a beam laid along the ridge of a roof; provides attachment for upper end of rafters
• noun:   any long raised border or margin of a bone or tooth or membrane
• noun:   a long narrow natural elevation or striation
• noun:   a long narrow range of hills
• noun:   any long raised strip
• verb:   extend in ridges

  Example: "The land ridges towards the South"

• verb:   spade into alternate ridges and troughs

  Example: "Ridge the soil"

• verb:   form into a ridge
• verb:   throw soil toward (a crop row) from both sides

  Example: "He ridged his corn"

• verb:   plough alternate strips by throwing the furrow onto an unploughed strip
• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6295)