Definitions for "Microbrewery"
By definition, a microbrewery was originally considered to be a brewery with a capacity of less than 3000 barrels (2500 hectoliters), but by the end of the 1980s this threshold increased to 15,000 barrels (12,500 hectoliters) as the demand for microbrewed beer doubled and then tripled.
A small brewery making specialty beers in small quantities.
A brewery that produces less than 15,000 barrels per year.