[to.bac.co] n, pl -cos [Sp tabaco, prob. fr. Taino, roll of tobacco leaves] (ca. 1565) 1: any of a genus (Nicotiana) of chiefly American plants of the nightshade family with viscid foliage and tubular flowers; esp: a tall erect annual tropical American herb (N. tabacum) cultivated for its leaves
2: the leaves of cultivated tobacco prepared for use in smoking or chewing or as snuff
3: manufactured products of tobacco (as cigars or cigarettes); also: smoking as a practice "has sworn off ~"