nix

exclamation2

1. •
   No! Not at all!

   • "Ugh! An inventor, eh?" "Nix! He's not an inventor himself, but he antes-up for 'em." — 1916
2. •
   (no longer used) A warning cry when a policeman or schoolmaster etc. was seen approaching.

verb2

1. •
   To make something become nothing; to reject or cancel.

   • Nix the last order – the customer walked out.
2. •
   To destroy or eradicate.

noun2

1. •
   (informal) Nothing.
2. •
   A treacherous water-spirit

   • A girl from a village near Lei[zig was one time at service in the house of a Nix. — 1828

noun1

1. •
   (Internet) Unix and various other similar or compatible operating systems.

   • Linux, Mac OS X, AIX, Solaris, and DG/UX are examples of *nixes.