Macbeth, Lady BrE AmE
a character in the play Macbeth by William ↑ Shakespeare . She encourages her husband, Macbeth, to kill Duncan, the king of Scotland, so that he can become king instead, and she is a stronger, more evil person than Macbeth himself. After the murder, however, she feels very guilty, and starts to walk in her sleep, trying to clean the imaginary blood of the dead king off her hands.