Design with such a broad denotation, there is no universal language or unifying institution for designers of all disciplines. This allows for many differing philosophies and approaches toward the subject.
This also allows many people to run into the terittory of unknown and unpredictable. This is where most of them drop:
Design is realization of a concept or idea into a configuration, drawing, model, pattern, plan or specification and which helps to achieve the item’s designated objective(s).
Final product OR design is something that ‘tells the story’. Designated objectives are ones that count.