Аннотация:Academic discourse is aimed at knowledge dissemination. Notwithstandingformalization and neutrality of this kind of discourse, it deals with languagepersonality, the time, global events and tendencies reflected by the key concepts.Considering AD, the concept KNOWLEDGE is substantial. The examination of the lexical units comprising this concept illustrates the trends in knowledge understandingin the articles on Philosophy. The study reveals the most frequently used lexical units,their context, and compatibility demonstrating the ways of knowledge acquisition andits essence as such.