0 the activity of climbing up buildings and other artificial structures, rather than rocks and mountains: --
Buildering often involves climbing without ropes or other safety equipment and is undertaken at night to avoid arrest.
You have heard of bouldering, but perhaps not buildering, in which climbing enthusiasts scale skyscrapers and other steel-and-glass Everests.
Buildering can be dangerous, but it mostly takes place at street level.
A sponsor asked if I'd be interested in scaling the Citicorp Citibank Center in Chicago, a 40-story climb, and so began my career in buildering.
He has swapped the mountains where he learnt his trade for the thrill of "buildering", or urban climbing.