| Acronym | Definition |
|---|
| CEIR | Center for Exhibition Industry Research |
| CEIR | Central Equipment Identity Register (UK cell phone database) |
| CEIR | Centre for Editorial and Intertextual Research (est. 1997; UK) |
| CEIR | Centre Européen d'Intérêt Rural (French: European Center of Rural Interest) |
| CEIR | Centre d'Études Internationales sur la Romanité (French: Center for Roman International Studies) |
| CEIR | Comité Européen de l'Industrie de la Robinetterie (French: European Committee for the Valve Industry; Brussels, Belgium) |
| CEIR | Computer-Enhanced Infrared |
| CEIR | Corporation for Economic Industrial Research |
| CEIR | Certified Expert Incident Responder (Lunarline School of Cybersecurity; various locations) |
| CEIR | Center for Economic and Industry Research, LLC (Salt Lake City, UT) |