CNG can mean:*Compressed natural gas, for example, CNG vehicles Cypriot National Guard, the combined arms force of the Republic of Cyprus Chinese National Geography, magazine published in China Comfort Noise Generator used in Speech Codecs to insert artificial noise during silent intervals of speech. Conseil National de Gouvernement, provisional government of Haiti from 1986 to 1988 Cyclic nucleotide-gated ion channel an ion channel gated by cyclic nuclotide like cAMP Certified Naturally Gr… (More on Cng)