The introductory article to the special issue dedicated to Igor Mel’čuk summarizes the main tenets of his “Meaning ⇔ Text” theory, and outlines its contribution to the development of diverse areas of modern linguistics. This theory can be characterized as a formalized, semantically oriented, multilevel, structural, functional and global model of language which explains the way the speaker generates the meaning embodied in the text. Both the article and the volume as a whole show the relevance of this theory for the development of semantics, grammar, pragmatics, typology and lexicography and highlight its theoretical and practical implications for linguistic studies and interdisciplinary research. We then briefly present the articles in this issue. Some of them were written directly in line with the “Meaning ⇔ Text theory” and were influenced by Mel’čuk’s ideas; others were the result of the stimulus that this theory, like its author, gave to the comprehension of the complex issues arising from the description of various levels of the language system. But all of them are related to Igor Mel’čuk, both as a linguist and a personality, and they are dedicated to him.