noun | verb
circlecircle1 /ˈsɚkəl/ noun 
► circle a curved line or shape that forms a shape like the letter O: Draw a circle around the correct answer. We stood in a circle and took turns throwing the ball to each other. The area where the red and blue circles overlap is purple.
► ring an object, mark, or group of people or things that is shaped like the edge of a circle: A ring of police officers surrounded the building. There was a dirty ring around the bathtub.
► loop a shape like a circle in a piece of string or wire: Put the end of the string through the loop and pull it tight.
► hoop a large piece of wood, metal, or plastic that is shaped like a ring: The dog was trained to jump through the hoops.
► oval a shape that is like a circle, but that is longer than it is wide: A running track is an oval.
► disk a flat round object: The gold disk on the crown represents the sun.
➔ see round1 noun | verb
circlecircle2 /ˈsɚkəl/ verb ► circle to move in the shape of a circle around something: The plane circled the airport before landing.
► orbit to move in a circle all the way around an object in space: It takes a year for the Earth to orbit the Sun.