Karol Dejna (10 November, 1911 – 15 April, 2004) was a Polish linguist. In 1930 he graduated from the Juliusz Słowacki State Secondary School in Tarnopol. He studied Polish philology at the Jan Kazimierz University in Lviv, from which he graduated in 1935. Until 1941 he worked as a teacher in Lviv secondary schools. From 1945 associated with the University of Łódź, initially as an assistant, then assistant professor (1947 defended his doctorate, 1952 habilitated), deputy professor (1951–1954) and professor (from 1954). From 1954 he was an associate professor, and from 1962 a full professor. In 1983 he became a correspondent member of the Polish Academy of Sciences, and in 1989 a full member of the Academy. From 1993 a correspondent member of the Polish Academy of Arts and Sciences. At the