The study explores the etymological and semantic challenges associated with the term beauty. The authors highlight that beauty is among the most vague and multifaceted concepts. As a result, its users often grasp completely different aspects/dimensions of it. After addressing etymological differences and conducting a conceptual analysis of its synonyms, the authors present empirical findings and a model outlining the semantic space of the term beauty. In the second part of the study, the authors shed light on the reasons behind the use of this ambiguous term, particularly focusing on its evolutionary and existential significance. The conclusion of the study draws attention to the fact that, despite the vagueness of the concept, beauty continues to play a key role in our lives, reflecting our need to share it, and portraying the human being as homo aestheticus.