tobacco UK /təˈbækəʊ/US /təˈbækoʊ/noun 3verb 2forms 4 noun3 •the dry brown leaves of a plant, cut up for smokingTobacco-settlement bonds are a tribute both to the inventiveness of bankers and the childlike impatience of politicians. — 2013 •A variety of tobacco.Tobaccos from the Connecticut Valley were used for wrapping cigars. •Any plant of the genus Nicotiana. verb2 •To indulge in tobacco; to smoke. •To treat with tobacco. formstobaccoed · tobaccoing · tobaccos · tobaccoes