Definition of furrow:
		
	
		
		
		(n) :
		
		a line cut in the soil, especially when 
plowed in order to plant a 
crop; a deep line in the skin of the face,  especially on someone's 
forehead
		 
								
				"don't walk across that deep furrow in the field."
			
			
	
		
		
		(v) :
		
		to make a cut in the ground; (About someone's brows or eyebrows) to pull them together due to worry, concentration, etc
		
								
				"cart wheels can furrow roads."