propanolPronunciation: /ˈprəʊpənɒl/Definition of propanol noun [mass noun] Chemistry each of two isomeric liquid alcohols used as solvents; propyl alcohol. Chemical formula: CH3CH2CH2OH ( 1-propanol, propan-1-ol) and CH3CH(OH)CH3 ( 2-propanol, propan-2-ol) Origin: late 19th century: from propane + -olpropanol in other Oxford dictionaries Definition of propanol in the US English dictionary