The meaning of the Acronym STI is...

STI is

• Signal Transduction Inhibitor
• Structured Treatment Interruptions
• Systolic Time Interval
• Severe Thumb Injury
• Sexually Transmitted Infection

More Meanings For STI:

• Set Interrupt Enable Flag
• Single Table Inheritance
• Still Image Architecture
• Symbol Table Information
• Source Transport Inversion
• State Transition Identifier
• Speech Transmission Index
• Search for Terrestrial Intelligence
• Slower Than I
• Shallow Trench Isolation
• Sweet Tits Indeed
• Smoky Turbo Inevitable
• Sick Turbocharged Insanity
• Sexually Transmitted Incident
• Sexually Transmitted Infection

STI is also in:

• Adults
• Assembly
• Chat
• Databases
• Drivers
• Electronics
• Funnies
• General
• Hospitals
• Networking
• Software
• Telecom