Architectural Design is problem solving by designing to solve a problem.
Architecture that doesn’t solve a problem, such as not fulfilling the intended program of the building, becomes art. If people can’t use the building, then what problem was solved
Source: http://bluearchitecture.wordpress.com/2011/06/18/what-is-
architectural-design/
http://www.cnvrgnc.com/storage/design-is-a-behaviour.jpg?__SQUARESPACE_CACHEVERSION=1258905942194
Definition 2
Source: http://www.wisegeek.com/what-is-architecture-design.htm
Definition 3
A graphic representation, especially a detailed plan for construction or manufacture.
Source:http://www.thefreedictionary.com/design