- Reg is a slang term or shortened reference for a regulation or registration.
An example of a reg is how someone would refer to a city sound ordinance; a city government reg.
- Slang regulation: government regs
- Geol. a large desert area covered with coarse gravel and small stones
An extensive, hard desert surface consisting of wind-polished gravel lying on alluvial soil and cemented together by mineralized solutions.
Origin of regMaghrebi dialectal Arabic, from Arabic riqq, ruqq, from raqqa, to be thin, fine; see rqq in Semitic roots.