The term User Experience (UX) was introduced to define the dynamics of the human-product interaction, and it was thought that design would have been a main recipient of UX research. However, it can be claimed that the outcomes of UX studies were not seamlessly transferred into design research and practice. Among the possible reasons, this paper addresses the fragmentary knowledge ascribable to the field of UX. The authors reviewed the literature analyzing the conceptual contributions that interpret UX, proposing definitions and/or a theoretical framework. This allowed the authors to provide an overview of recurring elements of UX, highlighting their relationships and affecting factors. This research aims to clarify the overall understanding of UX, along with its key components (the user, interaction, the system, and context) and dimensions (ergonomic, affective, and the cognitive experiences). The authors built a semantic construction inspired by the structure of a grammatical sentence to highlight the relationship between those components. Therefore, UX is defined by a subject/user who performs an action-interaction towards an object-system. A complement-context better defines the condition(s) where the action-interaction takes place. This work is expected to lay the foundations for the understanding of approaches and methods employed in UX studies, especially in design.