Real Dictionary

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: C2H5OH [...]
an enzyme, such as any of the respiratory enzymes, that activates oxidation-reduction reactions by transferring hydrogen from substrate to acceptor [...]
uncountable noun: Drinks that can make people drunk, such as beer, wine, and whisky, can be referred to as alcohol.
variable noun: Alcohol is a colourless liquid that is found in drinks such as beer, wine, and whisky. It is also used in products such as perfumes and cleaning fluids.