Definition of design
Design is the process of converting ideas or concepts into reality. Primary step of a design could be sketch, drawing, layout, configuration, model, specification etc.
In design process, an idea or concept is collected, developed, arranged appealingly to improve human experience to it, implemented or tested, researched and redeveloped upto an expected level, guided by conventions and principles accepted by the respective industry.
Design has many disciplines. The process and philosophy may vary in different disciplines.
Innovation of new things start through design. Time has a great impact on design. As we see that design of a specific thing evolves over time.