: a plant that produces leaves which are smoked in cigarettes, pipes, etc.
: the leaves of the tobacco plant used for smoking or chewing
: products (such as cigars or cigarettes) that are made from tobacco
Full Definition of TOBACCO
: any of a genus (Nicotiana) of chiefly American plants of the nightshade family with viscid foliage and tubular flowers; especially: a tall erect annual tropical American herb (North tabacum) cultivated for its leaves
: the leaves of cultivated tobacco prepared for use in smoking or chewing or as snuff
: manufactured products of tobacco (as cigars or cigarettes); also: smoking as a practice <has sworn off tobacco>