yah·wist I. noun alsojah·vistorjah·wistoryah·vist\-_wə̇st, -_və̇-\ (-s) Usage: usually capitalized 1.: the author of the Yahwistic or J passages of the Old Testament which refer to God as Yahweh and which are believed to have emanated from Judah, the southern kingdom of the ancient Israelites — called also Jehovist; compare jehovah 2.: a worshiper of Yahweh II. adjective Usage: usually capitalized : yahwistic