butanol Syllabification: (bu·ta·nol)Pronunciation: /ˈbyo͞otnˌôl, -ˌäl/Definition of butanol noun Chemistry each of two isomeric liquid alcohols used as solvents; butyl alcohol. Chemical formula: CH3CH2CH2CH2OH ( 1-butanol, butan-1-ol) and CH3CH2CH(OH)CH3 ( 2-butanol, butan-2-ol) butanol in other Oxford dictionaries Definition of butanol in the British & World English dictionary