In this video dimensions are defined as conflations of nested intensities/values within a unit with the repetition of that unit. Single dimensions could be combined together to form various multidimensional concepts. This video, just like all other videos in this series, is about cognitive patterns underlying mathematical thinking. The ideas in this video come from a book published in 2014 under a title CONCEPTUAL UNDERSTRUCTURE OF HUMAN EXPERIENCE which could be purchased from AMAZON.