Introduction. The article is devoted to the linguistic semantic characteristics of gastronomisms on the materials of culinary sites on the Internet. In the linguistic picture of the world, one of its most important parts is associated with food and human nutrition as a necessary and essential aspect of life. In the structure of this semantic field, a number of lexico-semantic groups can be distinguished. Among them, a special place is occupied by the names of culinary products, dishes used for food, which constitute the main content of the language of the culinary tradition. It is advisable to designate such names with the term «gastronomisms». The syntagmatic connections within them are of interest, that is, the compatibility of words within complex names of dishes. Purpose. The objective of the paper is to describe and systematize the ways of syntagmatic linking of words in the names of dishes on Internet culinary sites as the basis for their semantic characteristics. Results. The article shows that an important aspect of gastronomisms semantics is the syntagmatic relations in complex names, based on lexical and grammatical meanings of their components. The article identifies three types of compatibility of language units in gastronomisms: 1) by components of meanings; 2) by denotations, which are indicated by language units; 3) by grammatical meanings (syntactic positions). The components of meanings combine generic names of culinary products and names with additional food and non-food meanings, as well as generic names and proper names, which are foreign borrowings, toponyms and anthroponyms. By their denotations, the complex gastronomisms connect, as a rule, the denotative meanings of dishes and their food and non-food properties, dishes and their parts, as well as the ways and methods of their preparation, their purpose and functions. Finally, according to grammatical meanings, one can connect the grammatical subject and its attributes – simple and complex. The special kind of connections is that which contains the detailed subject, which is formed by the generic name of a dish and its proper name. Conclusion. The study gave grounds for the conclusion that an important aspect of the semantics of gastronomisms is syntagmatic relations in complex names based on the lexical and grammatical meanings of their components. Keywords: gastronomisms, culinary sites, semantics, syntagmatic relations, lexical meaning, grammatical meaning, denotation.