coasteeringPronunciation: /kəʊˈstɪərɪŋ/Definition of coasteering noun [mass noun] chiefly British the sport or activity of exploring a rocky coastline by climbing, jumping, and swimming: the more adventurous can try some of the various outdoor leisure activities, such as windsurfing, coasteering , kayaking, diving, or surfing Origin:blend of coast and mountaineeringcoasteering in other Oxford dictionaries Definition of coasteering in the US English dictionary