Design

Design is the totality of features that affect how a product looks, feels, and functions to a consumer.

Definition

According to Marketing Management by Keller and Kotler (15th edition),

Design. The totality of features that affect how a product looks, feels, and functions to a consumer.

According to the BABOK Guide (3rd edition),

Design. A usable representation of a solution. For more information see Key Terms (p. 14) and Requirements and Designs (p. 19).