Wiki answers it this way: Design thinking refers to creative strategies designers utilize during the process of designing. Design thinking is also an approach that can be used to consider issues and resolve problems more broadly than within professional design practice, and has been applied in business and to social issues.
Perhaps design thinking is another word for empathetic innovation. Perhaps it simply urges for a higher sensitivity towards man and his interaction with the environment to design for others.
Perhaps it invites the thinker to fully immerse himself in the end product, to connect intangible relationships, spot unseen gaps and re-imagine possibilities beyond parameters. Perhaps it is the needful perspective that thinkers adopt to break out of the silos.
Not only as a design thought process, but also as a way of life.