| Country | Term | Full Form | Definition | Meaning | Main Category // Subcategory | |
|---|---|---|---|---|
| Worldwide | SIR | Susceptible, Infected, Recovered/Removed | Medical // Healthcare | |
| Worldwide | SIR | Silent Information Regulator | Medical // Biochemistry | |
| Worldwide | SIR | Signal-to-Interference Ratio | Technology // Communication | |
| Worldwide | SIR | Short Interest Ratio | Business // Finance | |
| Worldwide | SIR | Surface Insulation Resistance | Academic & Science // Electrical | |
| Worldwide | SIR | Selected Ion Recording | Technology // Tech Terms | |
| Worldwide | SIR | Sigma Iota Rho | Associations & Organizations // Educational Organizations | |
| Worldwide | SIR | Supplemental Inflatable Restraint | Technology // Automotive | |
| Worldwide | SIR | Signal-to-Interference Ratio | Technology // Communication | |
| Worldwide | SIR | Sequential Importance Resampling | Computing // Programming & Development | |
| United States | SIR | Society of Interventional Radiology | Associations & Organizations // Medical Organizations | |
| United States | SIR | Staten Island Railway | Transport & Travel // Rail Transport | |
| United States | SIR | Sons In Retirement | Associations & Organizations // Regional Organizations | |
| United States | SIR | Statutory Invention Registration | Governmental // Law & Legal | |
| United Kingdom | SIR | Surrey Iron Railway | Transport & Travel // Rail Transport | |
| Switzerland | SIR | Sion Airport | Transport & Travel // Airport Codes | |
| Singapore | SIR | Singapore Infantry Regiment | Governmental // Military | |
| Ivory Coast | SIR | Societe Ivoirienne de Raffinage French | Business // Companies & Corporations | |
| Iran | SIR | School of International Relations | Academic & Science // Universities & Institutions | |
| India | SIR | Special Investment Region | Governmental // Policies & Programs | |
| India | SIR | Sirhind Junction | Transport & Travel // IRCTC Station Codes | |
| Canada | SIR | Saskatchewan International Raceway | Sports & Games // Sports Venues | |
The full form of SIR is Susceptible, Infected, Recovered/Removed in Medical (Worldwide).
The full form of SIR is Silent Information Regulator in Medical (Worldwide).
The full form of SIR is Signal to Interference Ratio in Technology (Worldwide).
The full form of SIR is Short Interest Ratio in Business (Worldwide).