CAST OFF

v. 1a. or cast loose To unfasten; untie; let loose (as a rope holding a boat). The captain of the boat cast off the line and we were soon out in open water. 1b. To untie a rope holding a boat or something suggesting a boat. We cast off and set sail at 6 A.M. 2. To knit the last row of stitches. When she had knitted the twentieth row of stitches she cast off. 3. To say that you do not know (someone) any more; not accept as a relative or friend. Mr. Jones cast off his daughter when she married against his wishes.