Définitions
1.NounAn enemy, especially an archenemy."Batman is in constant conflict with his nemesis, The Joker."
2.NounA 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.NounThe personification of the "fatal flaw" of a dramatic hero in the style of Greek tragedy.
4.NounPolar opposite, especially of a literary character.
5.NounThe principle of retributive justice.
6.NounA punishment or defeat that is deserved and cannot be avoided; (an instance of) retribution.