1 (alsocarouselespecially in North American English) (British English alsoroundabout)a round platform with model horses, cars, etc. that turns around and around and that children ride on at a fairground2(North American English) (British Englishroundabout)a round platform for children to play on in a park, etc. that is pushed round while the children are sitting on it3continuous busy activity or a continuous series of changing eventsHe was tired of the merry-go-round of romance and longed to settle down.