backspin /ˈbækˌspɪn/verb 2noun 2forms 3 verb2 •To spin (a ball) with this motion. •To play a section of a record in reverse, as a disc jockey; to apply spinback. noun2 •Spin applied to a ball in order to slow it, change its flight, or stop it when it lands. •Synonym of spinback. formsbackspun · backspinning · backspins