| Acronym | Definition |
|---|
| IRSL➣Instituto Real de San Luis (Spanish: Royal Institute of San Luis; Mexico) |
| IRSL➣Independent Roofing Supplies Ltd. (UK) |
| IRSL➣International Roundtables for the Semiotics of Law |
| IRSL➣Indo Rama Synthetics Ltd. (India; est. 1989) |
| IRSL➣Initial Risk Screening Level (state air quality standard) |
| IRSL➣Ingleburn RSL (Returned and Services League) Club (Australia) |
| IRSL➣Interest Rate Sensitive Liabilities (banking) |
| IRSL➣IR Stimulated Luminescence |
| IRSL➣Industrial Roofing Services Ltd. (est. 1973; Concord, Ontario, Canada) |