Definition of "nemesis" in English

noun

1. An enemy, especially an archenemy.

   • Batman is in constant conflict with his nemesis, The Joker.

2. A person or character who specifically brings about the downfall of another person or character, as an agent of that character's fate or destiny, especially within a narrative.

3. The personification of the "fatal flaw" of a dramatic hero in the style of Greek tragedy.

4. Polar opposite, especially of a literary character.

5. The principle of retributive justice.

6. (usually in the singular, formal) A punishment or defeat that is deserved and cannot be avoided; (an instance of) retribution.