This document is a research paper examining the concept of 'sleep' in the Javanese Suroboyoan language, focusing on its lexical semantics and meaning fields. The study conducts a qualitative analysis to classify and differentiate the various lexemes related to sleep, providing insights into their meanings, contexts, and social implications. Key findings are expected to reveal the complexity and diversity of sleep-related lexemes, ultimately offering a deeper understanding of Javanese language semantics.