Design Beyond Devices - Multimodality

You've just published a book called design beyond devices. The subtitle of the book is, creating multi motal, cross device experiences. When i would say a multi modality, a lot of people bee like, what is that? And it made sense to me at the time, because i had been working on, i multi motal experiences for a long while. But it was really interesting to kind of go out in the world and see what even in the design world, that the word 'multi' means.