ridge

a long narrow natural elevation or striation

any long raised strip

a long narrow natural elevation on the floor of the ocean

a long narrow range of hills

any long raised border or margin of a bone or tooth or membrane

a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters

The back, or top of the back; a crest.

extend in ridges

plough alternate strips by throwing the furrow onto an unploughed strip

throw soil toward (a crop row) from both sides

spade into alternate ridges and troughs

form into a ridge

To form a ridge of; to furnish with a ridge or ridges; to make into a ridge or ridges.