Architecture - As the name implies it's a High Level or Simplest form of describing any Software/Component/Application functionality.

There are different definitions of Architecture, here are some of them

• “… the structure or structures of the system, each of which comprises elements, the externally visible properties of those elements and the relationships among them.” – Software Architecture in Practice, 2nd Edition.
• Architecture is a very high level, high granular, system level design, which tells us what components our system is comprised of, how these components communicate, and what frameworks, tools, techniques and languages we will use. – Dr. Venkat Subramanium
• Structure of the components of a program or system their interrelationships and principles and guidelines governing their design and evolution over time.
• Software Architecture is the blueprint of a software system