yah·wis·tic adjective alsojah·vis·ticorjah·wis·ticoryah·vis·tic\(ˈ)yä|wistik, (ˈ)yȧ|-, -|vi-, -tēk\ Usage: usually capitalized 1.: characterized by the use of Yahweh as the name of God : written by the Yahwist — used of some parts of the Old Testament; 2.: of, belonging to, or characteristic of the religion and worship of Yahweh < the Yahwistic faith > < a Yahwistic rite >