The article is devoted to research and systematization of the specifics of modern meta descriptions of language in the context of Corpus Linguistics. Corpus Linguistics as a metalinguistic tool is the methodology of creation, use and study of corpora for metalanguage interpretation of the speech practice regularities by computer means. The need to summarize meta-language specifics of Corpus Linguistics is due to its being in high demand, contradictory competent interpretation, dynamics of computer-mediated communication and other factors. The issues of term system formation, Corpus Linguistics integration into the linguistic paradigm, methodological relevance of the corpus approaches to a wide range of speech practice research works were described. The essential specifics of notional and conceptual representation of the key lexeme corpus for the whole "corpus" lexical-semantic field, its metalanguage reflection and codification of the lemma corpus development and terminological absorption of the accumulated metadescriptions potential were revealed. Metalinguistic interpretation and verification of corpus activities were considered: the defining of the corpus data dominance limits in theoretical arrangement of the language science; interdisciplinary consensus of the corpus activities; the need for functional formalization, representation and interpretation of the semantics; the adaptation of corpus para-digmatics to the conditions of new communication reality, in particular the Internet, and others. Speech practice as the direct object of modern Applied Linguistics is constantly reproduced and realized in an enormous variety of texts. The practice of creation of its meta descriptions requires taking into account not only random samples, but the full scope of the reference data. Meta description by itself implies the object representation in the context and by means of a secondary semiotic or abstract system. Interpretation of speech practice gradually became a syncretic and interdisciplinary problem domain of modern science, and the speech has become a truly relevant source for qualitatively new scientific generalizations. In this context, the concept of corpus discourse is relevant as speech activities due to the practice of creating, using and studying the corpora. Thus, corpus methodology is the instrumentarium that allows exploring the language problems in a complex mode almost without exception; a unique basis for solving complex syncretic linguistic problems that allows avoiding the selectivity of "system" or "empirical" paradigmatic orientation. Meta-language systematization of the corpus paradigmatics is a necessary component of its consequential and reasoned potential realization.
