STD is an abbreviation used in several different contexts that stand for different terms.

Most commonly:

• Sexually transmitted disease (also, sexually transmissible disease)

Also:

• Doctor of Sacred Theology (see doctorate)
• Internet standard (a subset of the RFCs)
• Salinity Temperature Depth
• São Tomé and Príncipe dobra, the ISO 4217 code for the currency of São Tomé and Príncipe
• Short Term Disability
• Software Test Documentation, IEEE 829
• Standard
• State transition diagram
• Subscriber trunk dialling
• Subscriber toll dialling
• Severe tire damage

STD | STD