CAG can refer to different things depending on the context. Here are some possible meanings:

• Combat Applications Group: This is a former official name of Delta Force, a special operations force of the United States Army.
• Command Advisory Group: This is a group within the US Military Entrance Processing Command that plans and conducts strategic communications, innovation management, program evaluation studies, and concept analyses.
• Civil Affairs Group: This is an acronym for United States Marine Corps Civil Affairs Groups.
• Community Advisory Group: This is a group made up of representatives of diverse community interests that serves as the focal point for the exchange of information among the local community and EPA, the State regulatory agency, and other pertinent Federal agencies involved in cleanup of the Superfund site.

Other possible meanings of CAG include:

• Cagoule, a lightweight weatherproof raincoat or anorak with a hood.
• CAG promoter, used in molecular biology.
• CAG, a codon for the amino acid glutamine.
• Cagliari–Elmas Airport (IATA airport code: CAG) in Cagliari, Sardinia, Italy.
• Canadian Association of Geographers.
• Chassis Air Guide, in computers is Intels thermal solution to PC chassis.
• Cheap Ass Gamer, an online BBS community.
• China National Aviation Corporation (ICAO airline designator: CAG).
• Chinese Academy of Governance, a training center for middle and senior government officials of the Chinese government.
• Closed angle glaucoma, a type of eye disease.
• Colegio Americano de Guatemala (American School of Guatemala).
• Commander, Air Group, the informal name for the senior US Navy officer of a carrier air wing.
• Commentaria in Aristotelem Graeca, a series of original-language texts of ancient and Byzantine commentaries on Aristotle.

Its important to consider the context to determine the meaning of CAG.