Processed tobacco. Processed tobacco is any tobacco that has undergone processing, but does not include tobacco products. For purposes of this definition, the processing of tobacco does not include the farming or growing of tobacco or the handling of tobacco solely for sale, shipment, or delivery to a manufacturer of tobacco products or processed tobacco, nor does the processing of tobacco include curing, baling, or packaging activities. For purposes of this definition, the processing of tobacco includes, but is not limited to, stemming (that is, removing the stem from the tobacco leaf), fermenting, threshing, cutting, or flavoring the tobacco, or otherwise combining the tobacco with non-tobacco ingredients.
27 CFR § 40.11
When used in this part and in forms prescribed under this part, the following terms shall have the meanings given in this section, unless the context clearly indicates otherwise. Words in the plural form shall include the singular, and vice versa, and words indicating the masculine gender shall include the feminine. The terms includes and including do not exclude things not listed which are in the same general class.