big dipperBrE/ˌbɪɡ ˈdɪpə(r)/NAmE/ˌbɪɡ ˈdɪpər/noun(old-fashioned, BrE) asmalltrainatanamusement park, whichgoesveryquicklyupanddownasteeptrackandaroundbends(游乐场的)云霄飞车,过山车➡ see alsoroller coaster (1) the ˌBig ˈDipper(NAmE) (BrEthe Plough) [sing.]agroupofsevenbrightstarsthatcanonlybeseenfromthenorthernhalfoftheworld北斗七星;大熊星座