A wine which is made from more than 1 grape variety is known as a blended wine. Regions like Bordeaux, Southern Rhone, Rioja make world famous wines that are blends.
Whereas wines made from 1 grape variety are known as varietal or single varietal wines. Old world regions like Rhone, Alsace, & many new world regions like Napa valley, Marlborough, Barossa valley produce very well known varietal wines.