Circular/ˈsɜːrkjələr/ Definition 1 of 3Pro Tip 1/3Visual Imagery Imagine something perfectly round, like a coin or a plate, to grasp 'circular'. The garden has a circular pond in the center. Pro Tip 2/3Not Flat 'Circular' describes just the edge's shape; it can still be a 3D object. She wore a circular brooch. Pro Tip 3/3Not Always Perfect 'Circular' can be used for shapes that are roughly round, not only perfect circles. The artist painted a circular blob in the corner.