Believe it or not, in certain contexts, this is an appropriate use of dimension. Dimensions can be thought of as parameters, essentially. In 3d space, you have 3 parameters, length, width, and height. Add in time and you have 4d spacetime. From there, if you’re defining a system with more parameters, it’s a higher dimensional space. A movie with 3 spatial dimensions, then programmed smell releases, like someone else mentioned, would then be 4 dimensions: l,w,h,s. The reality is, it’s a bit silly and definitely a marketing gimmick to refer to your movie experience as “9d”, but it’s not entirely incorrect.
Believe it or not, in certain contexts, this is an appropriate use of dimension. Dimensions can be thought of as parameters, essentially. In 3d space, you have 3 parameters, length, width, and height. Add in time and you have 4d spacetime. From there, if you’re defining a system with more parameters, it’s a higher dimensional space. A movie with 3 spatial dimensions, then programmed smell releases, like someone else mentioned, would then be 4 dimensions: l,w,h,s. The reality is, it’s a bit silly and definitely a marketing gimmick to refer to your movie experience as “9d”, but it’s not entirely incorrect.