Circularity/ˌsɜːrkjəˈlærəti/ Definition 1 of 3Pro Tip 1/3Geometric Shape Used to describe objects that have a perfectly round form. The artist was praised for the circularity of his pottery designs. Pro Tip 2/3Physical Objects Often refers to something you can see or touch, not abstract ideas. The circularity of the wheel is key to its function. Pro Tip 3/3Natural Phenomena May describe naturally occurring round shapes in nature. Children noticed the circularity of the full moon.