1. (n.) An American plant (Nicotiana Tabacum) of the Nightshade family, much used for smoking and chewing, and as snuff. As a medicine, it is narcotic, emetic, and cathartic. Tobacco has a strong, peculiar smell, and an acrid taste.

2. (n.) The leaves of the plant prepared for smoking, chewing, etc., by being dried, cured, and manufactured in various ways.

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