left wingTranslate left wing | into French | into German | into Italian | into Spanish Definition of left wing noun (the left wing) 1the radical, reforming, or socialist section of a political party or system. [with reference to the National Assembly in France (1789–91), where the nobles sat to the president's right and the commons to the left] 2the left side of a team on the field in soccer, rugby, and field hockey:his usual position on the left wing the left side of an army:the Allied left wing adjective radical, reforming, or socialist:left-wing activistsDerivatives left-winger noun left wing in other Oxford dictionaries Definition of left wing in the US English dictionary