Definition of alcohol
1a
: ethanol especially when considered as the intoxicating agent in fermented and distilled liquors
b
: drink (such as whiskey or beer) containing ethanol
c
: a mixture of ethanol and water that is usually 95 percent ethanol
2
: any of a class of organic (see organic entry 1 sense 1b(2)) compounds that are analogous to ethanol and that are hydroxyl derivatives of hydrocarbons
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Merriam-Webster unabridged
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Time Traveler for alcohol
The first known use of alcohol was in 1672
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