1. To turn back, or to the contrary; to reverse. Till happy chance revert the cruel scence. Prior. The tumbling stream . . . Reverted, plays in undulating flow. Thomson. 2. To throw back; to reflect; to reverberate. 3. (Chem.) To change back. See Revert, v. i. To revert a series (Alg.), to treat a series, as y = a + bx + cx2 + etc., where one varia...