Entry 1 sense Webster, 1913 Detour /dĭt-o͝or'/ · De·tour · IPA /ˈdi.toɹ/ 01 n. A turning; a circuitous route; a deviation from a direct course; as, the detours of the Mississippi. 1. A turning; a circuitous route; a deviation from a direct course; as, the detours of the Mississippi.