DEC, dec or Dec may refer to:
This article deals with decision-making as analyzed in psychology. See also Decision theory.
Decapitation (from Latin, caput, capitis, meaning head) is the complete separation of the head from the body.
Decompression sickness (DCS; also known as divers' disease, the bends or caisson disease) describes a condition arising from dissolved gases coming out of solution into bubbles inside the body on depressurisation.
Decolonization (US) or decolonisation (UK) is the undoing of colonialism, where a nation establishes and maintains its domination over dependent territories.
The decathlon is a combined event in athletics consisting of ten track and field events. The word decathlon is of Greek origin, from δέκα (déka, meaning "ten") and ἄθλος (áthlos, or ἄθλον, áthlon, meaning "feat").
Decriminalization of non-medical cannabis in the United States has been attempted since the 1970s. As views on cannabis (or marijuana) have liberalized, over half of the states have either approved it for medical use, decriminalized it for recreational use, or completely legalized it and approved it for retail sale.
The Deccan Chargers, or Hyderabad Deccan Chargers known in short as DC, was a cricket franchise based in the city of Hyderabad in the Indian Premier League.