Home›Browse›C›carbon monoxidecarbon monoxideOur editors are putting together more complete content — check back in about 20 minutescarbon monoxidecarbon monoxide — nounnoun1. a poisonous gas produced by burning fuels, with no color or smell1.nounDefinitiona poisonous gas produced by burning fuels, with no color or smellExampleCarbon monoxide detectors can save lives.