Define Architectural Design?
Architectural Design refers to the actual design and layout of spaces where it encompasses many different elements including construction, design, and the manipulation of light as it relates to shadow.
Source: http://www.wisegeek.com/what-is-architecture-design.htm
Concept that focuses on the components or elements of a structure or system and unifies them into a coherent and functional whole, according to a particular approach in achieving the objective(s) under the given constraints or limitations.
Source: http://www.businessdictionary.com/definition/architectural-design.html
A style and method of design and construction of buildings and other physical structures.
Source: Wikipedia