This study aims to provide a rigorous, coherent, scientific, and epistemologically grounded interpretation of the concept of the “fourth dimension in architecture.” It seeks to liberate this concept from the limitations of superficial readings, rhetorical usage, pseudo-scientific simplifications, and purely formalist reductions. The central argument of the research is that the fourth dimension should neither be understood as the addition of a new geometric axis beyond the three recognized spatial dimensions nor as a poetic metaphor for the “sense of time.” Rather, it should be redefined as a perceptual-temporal, embodied, and phenomenological quality that emerges through the lived experience of human beings in space.

Through a critical examination of modernist, phenomenological, and digital approaches to the interpretation of the fourth dimension, this study proposes a new conceptual framework in which the relationship between modern physics, the philosophy of perception, and the Iranian-Islamic intellectual tradition is articulated not through superficial synthesis but through a theoretically grounded and interactive dialogue. Despite the widespread use of the notion of the fourth dimension in architectural discourse, the concept has often remained theoretically ambiguous and methodologically underdeveloped. In many architectural writings, it is either reduced to a formal-geometric extension of three-dimensional space or employed as a metaphorical reference to temporality without sufficient epistemological clarification. This ambiguity has generated conceptual inconsistencies and has limited the analytical potential of the concept in understanding architectural experience. The present study addresses this gap by proposing a more comprehensive interpretation that situates the fourth dimension within the dynamic relationship between perception, embodiment, temporality, and spatial meaning.
The research adopts a qualitative, interpretive, and analytical methodology based on documentary study, conceptual analysis, interdisciplinary inquiry, and comparative critique.

The findings suggest that the fourth dimension in architecture does not manifest through the “addition of another dimension,” but rather through a transformation in the mode of spatial existence as experienced by human beings. It becomes actualized only through the interaction of body, movement, light, memory, and time. This conclusion provides a theoretical foundation for rethinking contemporary architecture and for advancing a more profound analytical understanding of spatial experience.