Definition of "butanol"

(organic chemistry) Any of four isomeric aliphatic alcohols, C4H9-OH

1. butan-1-ol or n-butanol or butyl alcohol - CH3(CH2)3-OH  examples

2. butan-2-ol or sec-butanol - CH3CH2CH(CH3)-OH  examples

3. 2-methyl-propan-1-ol or iso-butanol - (CH3)2CHCH2-OH  examples

4. 1,1-dimethyl-ethanol or tert-butanol - (CH3)3C-OH  examples