Definition of beer
1
: a carbonated, fermented alcoholic beverage that is usually made from malted cereal grain (especially barley), is flavored with hops, and typically contains less than a 5% alcohol content — compare ale, craft beer, lager entry 1, malt liquor sense 2
2
: a carbonated nonalcoholic or a fermented slightly alcoholic beverage with flavoring from roots or other plant parts
birch beer
3
: fermented mash
4
: a drink of beer
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Merriam-Webster unabridged
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Time Traveler for beer
The first known use of beer was before the 12th century
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