a narrow groove made in the ground, esp. by a plow.

a narrow groovelike or trenchlike depression in any surface

the furrows of a wrinkled face.

to make a furrow or furrows in.

to make wrinkles in (the face)

to furrow one's brow.

to become furrowed.

noun

channel , corrugation , crease , crinkle , crow’s-foot , dike , fluting , fold , groove , gutter , hollow , line , plica , rabbet , ridge , rimple , rivel , ruck , rut , seam , trench , wrinkle , chamfer , crumple , ditch , drill , plow , stria , sulcus