| Acronym | Definition |
|---|
| SEY➣Air Seychelles (ICAO code) |
| SEY➣Secondary Electron Yield |
| SEY➣Search Engine Yearbook (Andre le Roux guidebook) |
| SEY➣Selenium-Enriched Yeast |
| SEY➣Second Emission Yield |
| SEY➣Sexually Exploited Youth Program (Marymound; Winnipeg, Manitoba, Canada) |