A tool which is flat, rectangular and commonly made of wood, metal or plastic and is used to draw, cut or check the straightness of straight lines
Living one's life against/without the use of alcohol, smoking, and illegal drugs
A board, or piece of wood or metal, having one edge perfectly straight, used to ascertain whether a line is straight or a surface even, and for drawing straight lines
A metal ruler or bar, with one edge known to be smooth and straight, used to determine flatness of surfaces