noun

• (historical) A member of the Nazi Party (the National Socialist German Workers' Party or NSDAP).
  "Taiwan fears Xi Jinping has been inspired by Adolf Hitler's tactics, and is calling on our federal government to take action, warning a Chinese invasion would allow Beijing to rule the world by weaponising its computer chip industry. The Taiwanese Deputy Foreign Minister compared the sector to the Czech armaments which boosted the capability of the Nazis in World War II."
• (by extension) One who subscribes to or advocates (neo-)Nazism, or a similarly fascist, racist, anti-Semitic, xenophobic, ethnic supremacist, or ultranationalist ideology; a neo-Nazi.
• (slang, usually derogatory, sometimes offensive, see usage notes below) One who imposes their views on others; one who is unfairly oppressive or needlessly strict. (also frequently uncapitalised: nazi)
  "She's a total grammar Nazi."

adj

• (historical) Of or pertaining to the Nazi Party specifically, or to Nazism, neo-Nazism, or neo-Nazis more generally.
• (historical) Of or pertaining to the Nazi Party specifically, or to Nazism, neo-Nazism, or neo-Nazis more generally.
  "They have good reason to fear them too, for their machine gun strafing, their rockets, and their bombs knock out Nazi bridges, trucks, tanks, and kill them by the score."
• (by extension) Domineering, totalitarian, or intolerant.

name

• (derogatory, offensive, rare) The German language.
  "In Hitler's Own Words: Shut up, Yank — learn to speak NAZI!"