1) Architecture design refers to the actual design and layout of spaces. Architecture encompasses many different elements including construction, design, and the manipulation of light as it relates to shadow. Throughout history, architects have found ways to create functional and practical spaces using any materials that were available.
What Is Architecture Design? Conjecture Corporation , Taken 28/6/11, http://www.wisegeek.com/what-is-architecture-design.htm
2) 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. See also behavioral design.
Architectural design, Business dictonary, Taken 28/6/11, http://www.businessdictionary.com/definition/architectural-design.html
3) Architecture refers to the design and planning stages of building construction. Architectural design is the process by which buildings, or structures, transform from an architect's vision to the finished plans used by construction professionals. The majority of the modern architectural designer's job is performed on a computer. As a result, much of architectural design degree programs focus on the use and application of industry standard technology- based courses, as well as courses in design principles, building codes, scale models, and architectural history. The US Department of Labor indicates the highest paid architects earn over $100,000 annually, but most earn between $45,000 and $80,000 a year.
Architectural Design, http://diplomaguide.com/directory/category/Architectural_Design.html