The fourth dimension is time. So a thing which is four-dimensional has height, width, depth, and moves, or otherwise changes over a period of time. Dance, theater, cinema, and videos exist in the first (height), second (width) and fourth dimensions. Comic strips, although experienced in the fourth dimension, as we experience everything over a period of time, do not themselves move. (In the fifth dimension, perhaps, might be all aspects metaphysical.)Related site: Signifying Nothing: The Fourth Dimension in Modernist Art and Literature, a discussion of ways such modernists as Duchamp and Picasso conceived of and used what they called the fourth dimension in their work. See modernism. Also see animation, automata, horology, kinesiologist, kinetic, measure, mobile, movement, music, periodicity, rhythm, and space-time.