A winery is a place where wine is made — the building and the business together. Grapes come in, get pressed, the juice ferments in big tanks or barrels, and the wine is stored there until it is ready to sell. The word covers the whole operation, so a winery may include the fields of grapes (the vineyard), the machines, the cellar where barrels rest, and often a shop and a tasting room for visitors. Note the difference many students miss: a vineyard is the land where grape plants grow; a winery is where those grapes become wine. Very often the same company owns both, and people speaking loosely will say 'we visited a vineyard' when they mean they went to the winery and drank wine — that loose use is normal and nobody will correct you. The word is neutral in feeling, not formal, and you will meet it most in travel writing, food writing, and tourist information. Countable: one winery, two wineries. Small family ones exist, and huge industrial ones too, and the word covers both.