There are several kinds of alcohols, depending on the moieties $\ce{R}$. Important classes include simple acyclic alcohols with the general formula $\ce{C_{n}H_{2n + 1}OH}$. The most famous one amongst this group is ethyl-alcohol $\ce{H3C-CH2OH}$ which is used in beverages. It is therefore very common that alcohol refers to this particular molecule.