alcohol
Americannoun
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Also called ethyl alcohol, grain alcohol, ethanol. Also called fermentation alcohol. a colorless, limpid, volatile, flammable, water-miscible liquid, C 2 H 5 OH, having an etherlike odor and pungent, burning taste, the intoxicating principle of fermented liquors, produced by yeast fermentation of certain carbohydrates, as grains, molasses, starch, or sugar, or obtained synthetically by hydration of ethylene or as a by-product of certain hydrocarbon syntheses: used chiefly as a solvent in the extraction of specific substances, in beverages, medicines, organic synthesis, lotions, tonics, colognes, rubbing compounds, as an automobile radiator antifreeze, and as a rocket fuel.
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whiskey, gin, vodka, or any other intoxicating liquor containing this liquid.
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Chemistry. any of a class of chemical compounds having the general formula ROH, where R represents an alkyl group and –OH a hydroxyl group, as in methyl alcohol, CH 3 OH, or ethyl alcohol, C 2 H 5 OH.
noun
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Also called: ethanol. ethyl alcohol. a colourless flammable liquid, the active principle of intoxicating drinks, produced by the fermentation of sugars, esp glucose, and used as a solvent and in the manufacture of organic chemicals. Formula: C 2 H 5 OH
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a drink or drinks containing this substance
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chem any one of a class of organic compounds that contain one or more hydroxyl groups bound to carbon atoms. The simplest alcohols have the formula ROH, where R is an alkyl group Compare phenol See also diol triol
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Any of a large number of colorless, flammable organic compounds that contain the hydroxyl group (OH) and that form esters with acids. Alcohols are used as solvents and for manufacturing dyes, perfumes, and pharmaceuticals. Simple alcohols, such as methanol and ethanol, are water-soluble liquids, while more complex ones, like cetyl alcohol, are waxy solids. Names of alcohols usually end in –ol.
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Ethanol.
Etymology
Origin of alcohol
1535–45; < New Latin < Medieval Latin < Arabic al-kuḥl the powdered antimony, the distillate
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
At one point, he forged a cabaret card, a mandated ID for musicians and entertainers between 1940 and 1967 who worked in establishments serving alcohol, which required individuals to be 18 years and older.
From Los Angeles Times
The sensor sits outside your underwear and can be cleaned with alcohol wipes.
While much has been made about younger generations drinking less alcohol— sales External link fell to a record low in 2025—Americans are avoiding more than just booze.
From Barron's
He had a clean driving licence and tests showed no trace of alcohol or drugs.
From BBC
O'Sullivan, who had a clean driving licence and showed no trace of alcohol or drugs, suffered serious injuries himself and was in hospital for four months following the incident.
From BBC
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
