This text examines phrases and idioms as units of onomasiology in the English language. It focuses on how phraseological units and idiomatic expressions reflect the process of naming concepts and expressing meaning. The study highlights the semantic features of phrases and idioms, their role in conveying cultural and contextual information, and their importance in language development. Understanding phrases and idioms as onomasiological units helps learners improve comprehension, enrich vocabulary, and develop a deeper understanding of English semantics.