Largely meaningless phrase that means the winery purchased the wine in bulk from another winery and bottled it.

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OR, a very specific term used by vintners (winemakers) to mean "produced by," as opposed to "brewed by", "distilled by," etc. Wine production is different that other processes, so this term have trade relevancy. This term has further use in the United States when registering an alcoholic beverage for sales and production approval with the TTB (Tax and Trade Bureau). It is a recognised phrase for use in the government requirements that must appear on wine label packaging.