The article presents reflections on the ideological and linguistic characteristics of the iconic figure of the collective portrait of the Ukrainian Language and Literature Department of the Sumy State Pedagogical University, named after A.S. Makarenko, in the second half of the XX - first decade of the XXI century, Candidate of Philology, Associate Professor Nataliia Pavlivna Deinychenko in the institutional, in particular, scientific and academic discourse. The scientific and teaching activity of the linguist, who worked at the Ukrainian Language Department for more than 40 years (1973-2015), is devoted to the formation of language stability, language sense and language taste of students and pupils, as well as to the development of language culture of teachers in the Sumy region. The source base is the texts of various genres of Ukrainian scientific and academic discourse of teacher-researcher of linguistic (dialectological, cultural), linguo-methodological orientation, represented in written (scientific and popular articles, abstracts, dissertation abstracts, methodological instructions, manuals) and oral (scientific communication with researchers of Ukrainian dialectology, lectures for students, speeches to students of the Sumy Branch of the Academy of Sciences of Ukraine, teachers of the Sumy Regional Institute of Postgraduate Pedagogical Education, the All-Ukrainian Society "Prosvita" named after Taras Shevchenko) forms, researched by means of general and specific scientific methods: analysis of scientific sources, descriptive generalisation (for general characteristics of the features of scientific and academic discourse), systematisation; biographical method - to clarify the facts of life and creative achievements, portrait method - to highlight the ideological and linguistic features of the linguistic personality of N. Deinychenko. The characteristics of scientific and academic discourse as an institutional form of communication, the functional basis of linguistic personality based on both scientific and linguistic, teaching and educational activities of the linguist are specified. The author emphasises the multidimensionality of the personality with a fine sense, understanding of the Ukrainian word, its origins, educational influence on the personality of young people and mastery of the whole complex of linguistic, communicative, moral and ethical norms of research. The scientific interests of the researcher include Ukrainian dialectology, history of the Ukrainian language, language culture, Ukrainian language teaching methods. The article pays attention to the formation of the researcher, professional on-scientific, teaching and educational activities and features of the linguistic personality: Ukraine-focused, dignity, diligence, versatile education, modesty, philosophical optimism, sense of humour, tact, professionalism, dedication, helpfulness, which corresponds to the mission of the Ukrainian-focused Department of the Pedagogical University, which is approaching its centenary. Key words: linguistic personology, linguistic personality, linguist, scientific and academic discourse, Nataliia Pavlivna Deynychenko, scientific activity, teaching activity, Ukrainian dialectology, teaching methods, culturally and linguistically diverse personality.