| Acronym | Definition |
|---|
| SAR | Specific Absorption Rate (measure of the rate of absorption of RF energy in the body) |
| SAR | Search And Rescue |
| SAR | Sons of the American Revolution |
| SAR | Student Aid Report |
| SAR | Synthetic Aperture Radar |
| SAR | Special Administrative Region |
| SAR | Saudi Arabian Riyal |
| SAR | Syrian Arab Republic |
| SAR | Successive Approximation Register |
| SAR | Structure-Activity Relationship |
| SAR | School for Advanced Research (Santa Fe, NM) |
| SAR | Staff Appraisal Report |
| SAR | Semi-Automatic Rifle (weapon) |
| SAR | Species-At-Risk |
| SAR | Sodium Absorption Ratio |
| SAR | System Architecture |
| SAR | Stock Appreciation Right |
| SAR | School Accountability Report |
| SAR | Site Assessment and Remediation (various locations) |
| SAR | Segmentation And Reassembly |
| SAR | Survival and Resilience |
| SAR | Summary Annual Report |
| SAR | Sarasota Springs (Amtrak station code; Sarasota Springs, NY) |
| SAR | Systemic Acquired Resistance |
| SAR | Semi-Annual Report |
| SAR | Supplied-Air Respirator (US OSHA) |
| SAR | Self-Assessment Report |
| SAR | Significant Architectural Requirement |
| SAR | Specific Absorption Rate |
| SAR | Security Assurance Requirements |
| SAR | Store Archive |
| SAR | Stop and Reverse (trading markets; stocks, bonds, commodities) |
| SAR | Seasonal Allergic Rhinitis |
| SAR | Sub-Acute Rehabilitation (medical care unit) |
| SAR | Second Assessment Report |
| SAR | Some Assembly Required |
| SAR | South African Railways |
| SAR | Safety Analysis Report |
| SAR | Snow and Avalanche Research (Switzerland) |
| SAR | South African Republic |
| SAR | San Antonio Rampage (hockey team) |
| SAR | Standards Assessment Report (education) |
| SAR | School of American Research (Santa Fe, NM, USA) |
| SAR | Son Altesse Royale |
| SAR | Selected Acquisition Report |
| SAR | Shift Arithmetic Right |
| SAR | State Agency Representative |
| SAR | Service Archive (JBoss Server) |
| SAR | Semi-Active Radar |
| SAR | Safety Assessment Report |
| SAR | Servizio Agrometeorologico Regionale (Italian: Regional Meteorological Services) |
| SAR | Sign-A-Rama (est. 1986) |
| SAR | Species-Area Relationship (ecology) |
| SAR | South Atlantic Review (est. 1935; Atlanta, GA) |
| SAR | South Australian Railways (South Australia, Australia) |
| SAR | Short Assault Rifle |
| SAR | System Archive |
| SAR | Southeast Asia Region |
| SAR | Solicitors Accounts Rules |
| SAR | Special Access Required |
| SAR | Special Autonomous Region |
| SAR | Service Authorization Request |
| SAR | Structural Activity Relationship (EPA) |
| SAR | Small Arms Range |
| SAR | Shareef Abdur-Rahim (basketball player) |
| SAR | Su Alteza Real (His/Her Royal Highness) |
| SAR | Svenska Arkitekters Riksförbund (Swedish: Swedish Architects Association; Stockholm, Sweden) |
| SAR | Special Access Requirement (US DoD) |
| SAR | System Access Request |
| SAR | Sea Air Rescue |
| SAR | Student-Athlete Reinstatement |
| SAR | Site Assessment Report |
| SAR | Situation Action Result |
| SAR | Security Assessment Report |
| SAR | Sarikoli (linguistics) |
| SAR | Stichting Architecten Research (Foundation for Architects' Research) |
| SAR | Single Aliquot Regeneration |
| SAR | Stable Auroral Red |
| SAR | Share Appreciation Right |
| SAR | Societatea Academica Romana (Romanian) |
| SAR | Sarcosinemia |
| SAR | Source Approval Request |
| SAR | System Address Register |
| SAR | System Activity Reporting |
| SAR | Sua Altezza Reale (His/Her Royal Highness) |
| SAR | Service Activity Report |
| SAR | Solution Assurance Review |
| SAR | Société d'Astronomie de Rennes (French: Astronomical Society of Rennes; Rennes, France) |
| SAR | San Andreas Reservoir (California) |
| SAR | Start Action Request |
| SAR | Satellite Access Request |
| SAR | Scaffold Attached Region (molecular biology) |
| SAR | Shift Amount Register |
| SAR | South Asian Religious News (est. 1981) |
| SAR | Standard Absorption Rate |
| SAR | Ship Alteration Record |
| SAR | Super Adventure Rockman (video game) |
| SAR | Side-looking Aperture Radar |
| SAR | Storage Address Register |
| SAR | Software Action Request |
| SAR | Summary Account Record |
| SAR | Southern Alpine Recreation (New Zealand) |
| SAR | Security Assistance Review |
| SAR | Singapore Armoured Regiment |
| SAR | System Acquired Resistance |
| SAR | Sysout Archival and Retrieval |
| SAR | Special Access Request |
| SAR | Software Architecture Review |
| SAR | Symmetrix Automated Replication |
| SAR | Sulfuric Acid Recovery (hydrocarbon processing application) |
| SAR | Subsequent Applications Review |
| SAR | Single Access Return |
| SAR | Surveillance Approach Radar |
| SAR | Subscriber Application Router |
| SAR | Salaire Annuel de Référence (French: Annual Salary of Reference) |
| SAR | Significant Activities Report |
| SAR | System Anomaly Report |
| SAR | Simulated Acidic Rain |
| SAR | Social Assistance Recipient (Canada) |
| SAR | Special Action Report |
| SAR | Security Access Requirement (code) |
| SAR | Squad Automatic Rifle |
| SAR | Salanter Akiba of Riverdale (Riverdale, New York) |
| SAR | Système d'Accès au Réseau (French: Network Access System) |
| SAR | Schedule Add Request |
| SAR | System Acquisition Report |
| SAR | Software Assurance Requirement |
| SAR | Suppressor Area Ratio (jet engines) |
| SAR | Summary Analysis Report |
| SAR | Stomach Acid Reflux |
| SAR | Shared Accommodation Rack |
| SAR | SOI Anomaly Reports |
| SAR | Sodium Adsorption Ratio unit |
| SAR | Subject Analysis and Retrieval |
| SAR | Software Answer Supervision |
| SAR | System Archive Retrieval |
| SAR | Short Annular Ring |
| SAR | Site & Acceptance Review |
| SAR | Systems Analysis Recording |
| SAR | Systems Assurance Review |
| SAR | Special Aeronautical Requirement |
| SAR | Sellability Analysis Report (Sprint) |
| SAR | Scientific Absorption Rate |
| SAR | Schedule and Requests |
| SAR | Stock-Adjustment Request |
| SAR | Sub-Account Representative |
| SAR | Service Aptitude Rating |
| SAR | Software Analysis Review (Telcordia) |
| SAR | Strategische Argumentatie en Research BV (Haarlem, Netherlands) |
| SAR | Specific Appropriation Request |
| SAR | Site Access Restricted |
| SAR | Security Audit Reduction |
| SAR | Significant Action Report |
| SAR | Safety Appraisal Report |
| SAR | Ship Alteration Request |
| SAR | Supply Activities Requirements |
| SAR | Supply Assistance Request |
| SAR | Situation Awareness Report |
| SAR | Supportive Academic Remediation |
| SAR | Signaling Access Routers (Sprint) |
| SAR | Sample Assessment Report |
| SAR | Sex Attitude Restructuring (course) |
| SAR | Supplies Account Representative |
| SAR | Support Air Request |
| SAR | Security Assistance Request |
| SAR | Semi-Autonomous Robotics |
| SAR | Suspicious Activity Report(ing) (banks reporting suspicious transactions) |
| SAR | Subconscious Analysis and Reprogramming (psychology) |
| SAR | Stoichiometric Air Requirement (gas combustion) |
| SAR | Software Anomaly Report |