1. interj. no. The man said nix, and he means nix.
2. exclam. No!; Stop it!; I disagree! (Usually Nix!) “Nix,” said Paul. “I can’t permit that.”
3. n. nothing. I got nix for a tip. And after I was so helpful!
4. tv. to put a stop to something; to say no to something; to ban something; to turn something down. I wanted to say a certain word in my speech, but the management nixed it.