Tobacconist University
The combination of different types of tobacco used to create a specific character and taste. In a cigar, this includes the filler, binder, and wrapper leaves from different parts of the plant, different plants, and different regions.  For pipe tobaccos, see Aromatic and English Blend definitions, or the Pipe Tobacco Blending section of Tobacco College.  Ultimately, blending is a big part of the art of making great luxury tobacco products.