The design world uses the term 'wireframe' to refer to the initial sketch or outline of your idea, whether that's a website, app, or landing page. From those primary sketches, the idea can then be revised, iterated, and polished, until it emerges as a finished product.
Ditto with the initial ideas for Pixar's Toy Story.
The design for the Super Bowl trophy was first sketched out on a cocktail napkin. Every brilliant design begins as a vague idea.