The authors of the "Lexicon" attempted, in one study (combining the efforts of philosophers, art critics, and philologists), to present a rather complete (as far as the matter of the study permits - since it is at times still in the process of formation or deconstruction - as well as according to the extent of the capabilities of the research team) picture of the non-classical aesthetic consciousness, of art, and, more broadly, of the variegated art-activity of the radically new (and transitional in essence) period of artistic culture that started somewhere in the middle of the 19th century. Its last period is marked here as POST-culture (see: POST-).

The "Lexicon" includes essays on the following topics:

- main philosophical-aesthetic, applied scientific, etc., theories, concepts, and problems of artistic culture (and particular art forms) of the last third of the 19th- 20th c. (existentialism, informational aesthetics, Freudism, structuralism, semiotics, hermeneutics, postmodernism, etc.)

- the main, most significant, as well as original and unique authors in the fields of aesthetics, philosophy, and art theory of the period in question (Bergson, Baudrillard, Bakhtin, Deleuze, Derrida, Freud, Heidegger, etc.)

- non-classical trends, movements, schools, styles in artistic culture (i.e., in the main art forms and their non-traditional forms) of the period in question (abstract art, avant garde, aleatorics, dodecaphony, cubism, surrealism, conceptualism, pop-art, etc.).

- the key figures in artistic culture and art-activity of the 20th c. of a non-classical orientation (Beckett, Berg, Beuys, Godard, Greenaway, Dali, Kandinsky, Le Corbusier, Malevich, Picasso, Stockhausen, etc.);

- aesthetic and specific art terminology that has formed in art criticism, philology, and aesthetics, in order to describe the processes and phenomena of non-classical artistic culture and particular artworks (the absurd, antinomy, action, assemblage, virtual reality, installation, artefact, thing, writing, concept, deconstruction, discourse, intertextuality, schizanalyse, etc.)

- certain philosophical-aesthetic concepts and artistic phenomena in the history of culture that stray away from the "classical" line of development, are marginal in respect to the latter, but have exercised a certain influence on, or are typologically close to, certain phenomena of contemporary non-classical culture in the proper sense of the term (in this case the authors limited themselves to general essays on medieval and Orthodox aesthetics as certain "non-classical" antitheses or paradigms of a number of processes of the 20th-c. artistic culture);