The meaning of the Acronym STD is...

STD is

• State Transition Diagram
• Sexy Train Driver

More Meanings For STD:

• Set Direction Flag
• LocoScript Standard
• State Transition Diagram graphics file
• Security Tools Distribution
• Save The Date
• Simple To Design
• Security Tools Distribution
• Subscriber Trunk Dialing
• Standard Trunk Dial
• Secondary Telecom District
• Some Thing Duh
• Soft Touch Denial
• Sweet Translucent Dreams
• Sacrae Theologiae Doctor
• Doctor of Sacred Theology

STD is also in:

• Academic Degrees
• Assembly
• Chat
• File Extensions
• Security
• SMS
• Software
• Telecom