| Acronym | Definition |
|---|
| CELT | Celtic |
| CELT | Corpus of Electronic Texts (Ireland) |
| CELT | Centre for the Enhancement of Learning and Teaching (Lancaster University, UK) |
| CELT | Center for Educational Leadership and Technology (Marlborough, MA) |
| CELT | Centre for English Language Teaching (Stirling, Scotland) |
| CELT | Center for Engineering Learning and Teaching |
| CELT | California Extremely Large Telescope |
| CELT | Crypto Equipment for Low-Speed Telegraphy |
| CELT | Compagnie Europeenne Loisirs et Tourisme (French: European Leisure and Tourism Company) |
| CELT | Consolidated Entry Level Training |
| CELT | Coherent Emitter Location Techniques |
| CELT | Cognitive Emotional Linguistic Training |