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