saltwortPronunciation: /ˈsɔːltwəːt, ˈsɒ-/Definition of saltwort noun a plant of the goosefoot family, which typically grows in salt marshes. It is rich in alkali and its ashes were formerly used in soap-making. Genus Salsola, family Chenopodiaceae saltwort in other Oxford dictionaries Definition of saltwort in the US English dictionary