Ruqaiya Hasan (3 July 1931 – 24 June 2015) was a professor of linguistics who held visiting positions and taught at various universities in England. Her last appointment was at Macquarie University in Sydney, from which she retired as emeritus professor in 1994. Throughout her career she researched and published widely in the areas of verbal art, culture, context and text, text and texture, lexicogrammar and semantic variation. The latter involved the devising of extensive semantic system networks for the analysis of meaning in naturally occurring dialogues.