:the Greek goddess of retributive justice
:one that inflicts retribution or vengeance
- Many a pursued man fell before his nemesis in the streets …
- —Agnes Morely Cleaveland
:a formidable and usually victorious rival or opponent
- The team was defeated by its old nemesis.
:an act or effect of retribution
- … pursue them with the nemesis of outraged humanity.
- —Donald Culross Peattie
- A nemesis of humankind since the first hand slapped the first cheek, mosquitoes have bitten their way into the American experience …
- —Jack Cox