Definition of plastic:
		
	
		
		
		(n) :
		
		a stiff but usually slightly flexible synthetic material, generally consisting of a hydrocarbon-based 
polymer; any similar synthetic material
		
 
			
	
		
		
		(adj) :
		
		of or pertaining to the inelastic, non-brittle, deformation of a material; capable of adapting to varying conditions: ecologically plastic animals,see Charles Darwin: Origin of Species