liqueur /lɪˈkɝ/verb 2noun 1forms 3 verb2 •to flavor or treat (wine) with a liqueur •to top up bottles of sparkling wine with a sugar solutionEvery champagne has to be liqueured after its disgorgement, to replace the inevitable loss. noun1 •A flavored alcoholic beverage that is usually very sweet and contains a high percentage of alcohol. formsliqueured · liqueuring · liqueurs