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.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
Dictionary pictures of the day
Do you know what each of these is called?
Click on any of the pictures above to find out what it is called.