B1 [ U ] the gray, black, or white combination of gas and very modest parts of carbon that's developed when some thing burns: Bonsack's cigarette rolling equipment, as revealed on U.S. patent 238,640 Religious leaders have often been distinguished between people that regarded smoking immoral or outright blasphemous. https://broadfar.com/non-combusted-cigarettes-a-safer-alternative-or-just-a-myth/