Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
External reference — all senses of the word “barre” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.
A barre is a stationary support or rail used in ballet exercises, providing a stable frame for dancers to hold onto while performing movements and exercises that improve technique and flexibility.