Definition of thread:
		
	
		
		
		(n) :
		
		a long, thin and flexible form of material, generally with a round cross-section, used in 
sewing, 
weaving or in the construction of 
string; a theme or idea
		
 
								
				"all of these essays have a common thread."
			
			
	
		
		
		(v) :
		
		to put thread through; to pass (through a narrow constriction or around a series of obstacles)
		
								
				"thread a needle"