WordReference Random House Learner's Dictionary of American English © 2015
to•bac•co /təˈbækoʊ/USA pronunciation
n., pl. -cos, -coes.
Plant Biology[uncountable] a plant of the nightshade family whose leaves are prepared for smoking.
the prepared leaves of this plant, as used in cigarettes, cigars, and pipes: [uncountable]The smell of tobacco hung in the room.[countable]different tobaccos for different blends.
Collins Concise English Dictionary © HarperCollins Publishers::
tobacco /təˈbækəʊ/ n ( pl -cos, -coes)
Etymology: 16th Century: from Spanish tabaco, perhaps from Taino: leaves rolled for smoking, assumed by the Spaniards to be the name of the planttoˈbaccoless adj
- any of numerous solanaceous plants of the genus Nicotiana, having mildly narcotic properties, tapering hairy leaves, and tubular or funnel-shaped fragrant flowers. The species N. tabacum is cultivated as the chief source of commercial tobacco
- the leaves of certain of these plants dried and prepared for snuff, chewing, or smoking
'tobacco' also found in these entries: