| Acronym | Definition |
|---|
| CZ | Czech Republic |
| CZ | Condition Zero (video game) |
| CZ | Cubic Zirconia |
| CZ | Canal Zone |
| CZ | Comfort Zone |
| CZ | Catanzaro (Italy) |
| CZ | Czechoslovakia (now Czech Republic) |
| CZ | Catanzaro (Calabria, Italy) |
| CZ | Catanzaro (Italian province) |
| CZ | Carl Zeiss (optical company) |
| CZ | Combat Zone |
| CZ | Ceska Zbrojovka (gun manufacturer in the Czech Republic) |
| CZ | Crvena Zvezda (Serbian: Red Star; football club) |
| CZ | Czochralski (SI crystal growing technique) |
| CZ | Coastal Zone |
| CZ | Croatia Zagreb |
| CZ | Contact Zone |
| CZ | Control Zone |
| CZ | Construction Zone |
| CZ | Campzone (Netherlands) |
| CZ | Clear Zone |
| CZ | Convergence Zone |
| CZ | City Zone |
| CZ | Cyber Zone |
| CZ | Crown Zellerbach |
| CZ | Crvena Zastava (car and weapon factory in Kragujevac, Serbia) |
| CZ | Communications Zone |
| CZ | Crows Zero (movie) |
| CZ | Coaster Zombies |
| CZ | Cane-Zebiak |
| CZ | Censor Zone |
| CZ | Coahuila and Zacatecas Railway |
| CZ | Centrum Zamestnanosti (Slovak: Employment Center) |
| CZ | China Southern Airlines Airport Code |