What is Architectural Design?

Architecture - It is the profession of designing open spaces, buildings and other artificial construction and environment. It also involves supervision of construction work and remodeling of existing buildings.

Source: http://dictionary.reference.com/browse/architecture

Design - It is the removal of restrictions/limits to plan something new.

Source: http://dictionary.reference.com/browse/design

Architectural Design - It is a concept that focuses on the components of a structure/system and combine them into a logical and functional object. This is done under the restrains and limitations.

Source: http://www.businessdictionary.com/definition/architectural-design.html