Sontag, Susan Syllabification: (Son·tag, Susan)Pronunciation: /ˈsänˌtag/Definition of Sontag, Susan (1933–2004), US writer and critic. She established her reputation as a radical intellectual with Against Interpretation (essays, 1966). Other notable works: On Photography (1976) and Illness as Metaphor (1979). Sontag, Susan in other Oxford dictionaries Definition of Sontag, Susan in the British & World English dictionary