ˈsɜːk.jə.lə(ɹ) ˈsɝk.jə.lɚ ˈsɜːk.jə.lə(ɹ) ˈsɝk.jə.lɚ ˈɹoʊtəɹi describing a circle; moving in a circle the circular motion of the wheel having the shape or form of a circle an advertisement (usually printed on a page or in a leaflet) intended for wide distribution he mailed the circular to all subscribers