| Term | Full Form | Definition | Meaning | Main Category | Subcategory | Country/ Region | Popularity |
|---|---|---|---|---|---|
| AR | Acoustic Research | Business › Companies & Corporations |  |
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| AR | Allah-Rakha | Society & Culture › Celebrities & Famous |  |
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| AR | ArmaLite | Business › Companies & Corporations | |
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| AR | Aortic Regurgitation | Medical › Diseases & Conditions |  |
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| AR | Aspect Ratio | Transport & Travel › Air Transport | |
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| ar | Argentina (TLD) | Computing › Domain Names (TLD) |  |
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| Ar | Architect | Business › Job Titles | |
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| AR | Arkansas | Regional › States & Districts | |
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| ar | Archiver | Computing › Software & Applications | |
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| Ar | Aryl group | Academic & Science › Chemistry | |
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| AR | Anti Reflective | Technology › Tech Terms | |
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| AR | Alternate Reality | Miscellaneous › Fictional | |
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| AR | The Architectural Review | Media & Entertainment › Journals & Publications |  |
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| AR | Accelerated Reader | Computing › Software & Applications | |
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| Ar | Archimedes number | Academic & Science › Engineering | |
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| Ar | Relative atomic mass | Academic & Science › Chemistry | |
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| AR | Army Reserve | Governmental › Military |  |
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| AR | Assistant Referee | Sports & Games › Football | |
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| AR | Atrophic Rhinitis | Medical › Diseases & Conditions | |
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| AR | Artificial Respiration | Medical › Treatments & Procedures | |
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| AR | Absolute Return | Business › Finance | |
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| AR | American Renaissance | Media & Entertainment › Journals & Publications | |
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| AR | Alpha and Absolute Return | Media & Entertainment › Journals & Publications | |
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| ar | Armeerundschau | Media & Entertainment › Journals & Publications |  |
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| ar | Argent | Academic & Science › Chemistry | |
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