Traditional housinghas an appearance and an inner morality which is expressed as a secret and allegory. Liminal spaces are a part of this appearance that has numerous hidden concepts. The way of manifestation of the "liminality" in architecture can be conversed in the traditional buildings under the title of "Liminal architecture", a language that is the identical for all the spaces that focus on the transfer issue. These liminal spaces are entrances, verandas, openings (rooms), passing spaces, partition spaces, and stairs. The current research by means of a descriptive-analytical method’ investigates the way of liminal manifestation in traditional homes and tries to obtain solutions to read out its hidden concepts. In this regard, numerous questions have been raised; in order to answer these questions, the limen has been considered as a definable concept by the physical, functional and semantic components, and its features have been investigated in each component based on objective (tangible and understandable) and subjective (tangible and evident) perspective. Based on this fact, it was found that most of the liminal architectural features can appear in the entrance structural elements and the verandas of the traditional houses. Consequently, the manifestation of the liminal architecture was investigated in these two physical elements in samples of traditional housing in Yazd. The research results demonstrate that the inside and outside spatial interaction between liminal spaces of traditional houses of Yazd lead to the creation of several concepts in the physical, functional and semantic subsystem of the liminal architecture.
