laudanum /ˈlɔːdənəm/verb 2noun 1forms 3 verb2 •To add laudanum to (a drink or the like). •(rare) To cause (a person) to be high on laudanum. noun1 •Any of several tinctures of opium, once widely used for various medical purposes and as a recreational drug.Whatever else was wanting to a wise man's happiness, —of laudanum I would have given him as much as he wished, and in a golden cup. — 1821 formslaudanumed · laudanuming · laudanums