This research is a series of studies dedicated to investigation of semantic field of words of the thematic group "сlothing" of the Chinese language from the point of view of a system-structural approach. The article presents a part of research of a synonymous series ― 外衣/outerwear», since the study of this lexical-semantic group (LSG) is relevant, firstly, because there has been little research of its semantic structure, allowing to identify differential and integral semes, secondly, from the point of view of the analysis of synonymous correlations between lexical units within the semantic field. At the present time, in modern linguistics there is no unified idea of the criteria for synonymy, since the synonymous series in lexicographic sources are not presented in the same way. What is even more problematic and at the same time relevant is the allocation of a dominant within the synonymous series, which is important when compiling synonymous dictionaries. This article attempts to classify synonyms, embed them in synonymous series in accordance with their definitional characteristics. In order to build a more complete picture of the semantics of synonyms, both modern and historical lexicographic sources in the Chinese language were involved in the search and collection of factual material.