| Acronym | Definition |
|---|
| UTI | Urinary Tract Infection |
| UTI | Universal Technical Institute |
| UTI | Unidade de Terapia Intensiva (ICU in Portuguese) |
| UTI | Under the Influence |
| UTI | Unit Trust of India (mutual fund) |
| UTI | Under the Impression (chat) |
| UTI | Unified Theory of Information |
| UTI | Universal Transport Interface |
| UTI | Universal Transaction Identifier |
| UTI | Universal Text Interface |
| UTI | Universal Timing Interface |
| UTI | Ullage-Temperature-Interface (sensor) |
| UTI | Unique Trade Identifier (International Swaps and Derivatives Association, Inc.) |
| UTI | Uniform Type Identifier (Apple Computers) |
| UTI | Universal Text Interchange |
| UTI | Unified Testing Initiative (mobile applications; now AQuA) |
| UTI | Union Internationale des Télécommunications (French: International Telecommunication Union) |
| UTI | Universal Transport Interface (Cisco) |
| UTI | Up the Irons (band) |
| UTI | Underground Technology, Inc. |
| UTI | Union Territory of India |
| UTI | United Telecom Incorporated |
| UTI | User Test Instrumentation |
| UTI | Upper Tactical Internet (battlefield communications network used by echelons from corps down to brigade) |
| UTI | Unité de Transport International (French: International Transport Unit) |
| UTI | Under Trust Instrument |