soapwort Syllabification: (soap·wort)Pronunciation: /ˈsōpwərt, -ˌwôrt/Definition of soapwort noun a plant of the pink family, with fragrant pink or white flowers and leaves that were formerly used to make soap. Saponaria officinalis, family Caryophyllaceae soapwort in other Oxford dictionaries Definition of soapwort in the British & World English dictionary