| Acronym | Definition |
|---|
| TMI | Too Much Information |
| TMI | Three Mile Island |
| TMI | Transactions on Medical Imaging |
| TMI | TRMM Microwave Imager |
| TMI | Texas Military Institute |
| TMI | The Mountain Institute (West Virginia) |
| TMI | Total Market Index (Dow Jones STOXX) |
| TMI | Treasury Management International (London, England, UK) |
| TMI | Trans-Mars Injection |
| TMI | Total Magnetic Intensity |
| TMI | Total Marrow Irradiation |
| TMI | Texas Materials Institute |
| TMI | Trainable Mentally Impaired |
| TMI | Teen Missions International |
| TMI | Top Mount Intercooler |
| TMI | Transmarginal Inhibition (psychology) |
| TMI | Tauber Manufacturing Institute (University of Michigan Business School & College of Engineering) |
| TMI | Tennessee Military Institute |
| TMI | Tele Media International |
| TMI | Taxes, Maintenance, and Insurance |
| TMI | Too Much Internet |
| TMI | Tradeshow Multimedia, Inc. (Warrensville Heights, OH) |
| TMI | Thai Medical Informatics Association (Thailand) |
| TMI | Technical Military Instruction |
| TMI | Technovative Marketing Inc. |
| TMI | TELUS Mobility Incorporated (western Canada phone service) |
| TMI | Technology Maturation Initiative |
| TMI | Training Management Institute |
| TMI | Tenant Move In (Pentagon Renovation Project) |
| TMI | Tympanic Membranes Intact (medical) |
| TMI | Technical Manual Index |
| TMI | Traffic Management Systems Interface CSCI |
| TMI | Tan-O-on Marketing, Inc. |
| TMI | Touched, Moved, and Inspired |
| TMI | Technology-of-Mutual-Interest |
| TMI | Tranches Marginales d'Imposition (French: Marginal Tax Bracket) |
| TMI | Tri-Methyl Indium |
| TMI | Traditional Mortgage Insurance (banking) |
| TMI | Technical Manual Indicator |
| TMI | Track Message Identifier (transatlantic air travel) |
| TMI | Top Management Issue |
| TMI | Text Mining Infrastructure |
| TMI | Target Management Initiative |
| TMI | Tenant Move In |
| TMI | The Moving Image (band) |
| TMI | Trans Met Incorporated (defense equpiment and services; Cibolo, TX) |
| TMI | Thomas More Institute (Canada) |