| Acronym | Definition |
|---|
| ALR | Alliance for Lupus Research (New York City) |
| ALR | American Law Reports (analysis legal issues) |
| ALR | American Legion Riders |
| ALR | Automatic Locking Retractor (seat belts) |
| ALR | Assisted Living Residence |
| ALR | Agricultural Land Reserve (Canada) |
| ALR | Administrative License Revocation |
| ALR | Address Low Register |
| ALR | Advanced Logical Research |
| ALR | Automatic Locking Retractor |
| ALR | Access List Rule |
| ALR | Acceptable Level of Risk (US Air Force) |
| ALR | Adaptive Link Rate (green communications) |
| ALR | Art Loss Register |
| ALR | Analgesia |
| ALR | Australian Law Reports (University of Tasmania Library) |
| ALR | Assignment of Leases and Rents |
| ALR | American Law Review |
| ALR | Adam LaRoche (baseball player) |
| ALR | Australian Literary Review |
| ALR | Action Leakage Rate (annual average atmospheric dispersion factor) |
| ALR | Allgemeines Landrecht (Prussian civil code) |
| ALR | adiabatic lapse rate |
| ALR | Automated Lab Reactor (equipment) |
| ALR | Aciéries et Laminoirs de Rives (French steel manufacturer; Rives, France) |
| ALR | Advanced Launch System |
| ALR | Artillery Locating Radar |
| ALR | Active Life Reserves (insurance) |
| ALR | Amicale Laïque de Redon (French sports association; Redon, France) |
| ALR | Allergenic Effects |
| ALR | Application Location Register (Sprint) |
| ALR | Association Lyonnaise de Radioamateurs (French amateur radio club; Lyon, France) |
| ALR | Airlift-Loop Reactor |
| ALR | Aircraft Load Rating (aviation) |
| ALR | Advanced Logic Research, Incorporated |
| ALR | Alternate Link Routing |
| ALR | Acceptable Loss Rate |
| ALR | Administrative Letter Report |
| ALR | Associated Lighting Representatives, Inc (Oakland, CA) |
| ALR | Automated Legal Research |
| ALR | Association des Loisirs de Rogerville (French: Rogerville Recreation Association) |
| ALR | Academy Law Review |
| ALR | Agents Loss Reporting |
| ALR | Application-level Requirement |
| ALR | Automatic Laser Restart |
| ALR | Application Layer Relay (ANSI) |
| ALR | Automated Literature Request System (Sprint) |
| ALR | Automatic Lightpath Restoration (Lucent) |
| ALR | Airborne Laser Range Finder |
| ALR | Allowable Level of Risk |
| ALR | Augusto Luis Ralha |