/ˈkænjənɪŋ ||; ˈkænjənɪŋ/(US 美 canyoneering /ˌkænjəˈnɪrɪŋ ||; ˌkænjə ˈnɪrɪŋ/) noun [U] a sport in which you follow mountain streams into deep valleys (canyons) by climbing down with ropes or by being carried along by the fast-flowing water 溪降运动﹙在峡谷处绕绳下降或被急流‘下﹚