STD explained

STD is most commonly a three letter acronym for sexually transmitted disease.

STD may also refer to:

Doctor of Sacred Theology, (Sacrae Theologiae Doctor)
São Tomé and Príncipe dobra, the ISO 4217 code for the currency of São Tomé and Príncipe
Standards or Standardization
Standard deviation, a statistical measure
Internet standard, a specification for an innovative internetworking technology or methodology
State transition diagram, a graphical representation of a state transition for a finite state machine
Subscriber trunk dialling, or subscriber toll dialling
The Scottish Football League Third Division
Sunbeam-Talbot-Darracq, one of the many incarnations of the Sunbeam Car Company
The New York Stock Exchange symbol for Grupo Santander

In music:

Saves the Day, an American punk rock/emo/indie music band
Severe Tire Damage (band), a rock and roll "garage" band from Palo Alto, California
Severe Tire Damage (album), a 1998 album by They Might Be Giants

See also