(n) :
		
		an artists brush used in oil and acrylic painting with a long 
ferrule and a flat, somewhat tapering bristle head; a 
neologism intended as a positive-sounding 
umbrella term to describe various kinds of non-religious and non-superstitious people. (There is a Wikipedia article on this usage.)
		
 
								
				"definition A person whose world view is free of 
supernatural and 
mystical elements. The ethics and actions of a bright are based on a 
naturalistic world view. (2003, Paul Geisert and Mynga Futrell)"