UX Initialism of user experience. Noun Initialism of user experience. Coordinate Terms: CX DX DevEx EX Initialism of Unix. Coordinate Terms: POSIX Multics Forms UXes Synonyms UE Hyponyms A/UX DG/UX HP-UX Related UI *nix UN*X unix Unix UNIX Derived UI/UX UXD A/UX DG/UX HP-UX