To reject the validity or authority of: "Chaucer . . . not only came to doubt the worth of his extraordinary body of work, but repudiated it\u201d ( Joyce Carol Oates). To reject emphatically as unfounded, untrue, or unjust: repudiated the accusation. To refuse to recognize or pay: repudiate a debt. To disown (a child, for example). To refuse to have any dealings with.