Arrhenius, Svante AugustPronunciation: /əˈreɪnɪəs, əˈriːn-/Definition of Arrhenius, Svante August (1859–1927), Swedish chemist, noted for his work on electrolytes. Nobel Prize for Chemistry (1903). Arrhenius, Svante August in other Oxford dictionaries Definition of Arrhenius, Svante August in the US English dictionary