| Acronym | Definition |
|---|
| HRL | Host Revocation List |
| HRL | Housing and Residential Life (various schools) |
| HRL | High Rock Lake (North Carolina) |
| HRL | Hughes Research Laboratories |
| HRL | Harlingen, TX, USA (Airport Code) |
| HRL | Health Reference Level |
| HRL | Hydrosystems Research Laboratory (Florida Atlantic University) |
| HRL | Hunter River Lancers |
| HRL | Horizontal Reference Line |
| HRL | Health Research Laboratory |
| HRL | Hereditary, Relativist and Logistic (economic theory) |
| HRL | Home Run League (adult Wiffle ball league) |
| HRL | Hemostasis Reference Laboratory (Hamilton Civic Hospitals Research Centre, Hamilton, Ontario, Canada) |
| HRL | Halifax Regional Libraries |
| HRL | Hardware Requirements List |
| HRL | Histopathology Reference Library (Hercules, CA) |