| Acronym | Definition |
|---|
| ISLD➣International School Library Day (est. 1999) |
| ISLD➣Inter-Service Liaison Department (US Navy) |
| ISLD➣Island ECN, Inc. (stock symbol) |
| ISLD➣Idaho State Liquor Dispensary (Boise, ID) |
| ISLD➣International Society for Lasers in Dentistry |
| ISLD➣Institute for the Study of Learning Difficulties (Australia) |
| ISLD➣Inter-Stimulus Level Difference (auditory medicine) |
| ISLD➣Interaural Sensation Level Difference (auditory medicine) |