nullification

noun

1. (countable, uncountable)The act of nullifying; a rendering void and of no effect, or no legal effect.

   “Mason and I had an entirely civil debate about the merits of nullification versus an official "apology" for what had been done to Oppenheimer. I argued that an apology was not sufficient and that nullification was required precisely to restore the integrity of the security-review system.”

2. (countable, uncountable)The nullification crisis in U.S. history, confrontation between the state of South Carolina and the federal government in 1832–33 over the former's attempt to declare null and void within the state the federal Tariffs of 1828 and 1832.

   “He infused the threat with credibility, and the nullification movement fizzled, though Jackson also helped craft a compromise reduction in tariff rates to somewhat mollify South Carolinians.”

3. (countable, neologism, uncountable)Surgical removal of genitals (and sometimes nipples) as a form of body modification.

   “Surgeons talk about procedures that result in bodies that don't exist in nature: those with both sets of genitals – the "phallus-preserving vaginoplasty"; double mastectomies that don't have nipples; "nullification" surgery, where there are no genitals at all, just smooth skin.”