Also see definition of "Letter" in Word Study
Letter [ebd]
in Rom. 2:27, 29 means the outward form. The "oldness of the letter" (7:6) is a phrase which denotes the old way of literal outward obedience to the law as a system of mere external rules of conduct. In 2 Cor. 3:6, "the letter" means the Mosaic law as a written law. (See WRITING.)
Also see definition of "Letter" in Word Study
