This article aims to conduct a thorough analysis of the spatial postposition sǝr in the Gilaki dialect of Rasht, which is one of the Iranian languages spoken in the north-western region. The study is undertaken within the field of Cognitive linguistics, which focuses on the many meanings of lexical elements. The meaning of a lexeme consists of a network of interconnected senses, with some senses being more schematic in relation to others, and certain senses representing extensions in comparison to more common values. Hence, the article aims to not only present the normal and less common meanings of the Gilaki postposition sǝr but also provide multiple schematic representations for it. The data for this current research is collected synchronously from contemporary Gilaki utterances and analyzed using a qualitative method, supported by rich linguistic evidence in the form of oral and written Gilaki samples. It is important to mention that the data used in the study came from the Gilaki people of Rasht.