Cited from Wikipedia:
Architectural design values make up an important part of what influences an architect and designer when they make their design decisions. However, architects and designers are not always influenced by the same values and intentions.
Cited from wiseGeek:
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.
Cited from BusinessDictionary:
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.