free solo
noun
plural free solos
rock climbing
: a climb in which a climber uses no artificial aids for support and has no rope or other safety equipment for protection in case of a fall
Before attempting his free solo of Moonlight Buttress, [Alex] Honnold rehearsed the most challenging pitch on rope repeatedly, until he had memorized each move.—
Nathaniel Rich
He's attempting to do something that professional rock climbers have long thought was impossible—a "free solo" ascent of the world's most iconic cliff. That means he is alone and climbing without a rope as he inches his way up more than half a mile of sheer rock.—
Mark Synnott
free soloist
noun
plural free soloists
Aside from good sneakers and a bit of friction-inducing chalk on the palms, there is nothing to prevent a free soloist from a fatal fall.
—
Rafer Guzmán
Honnold … has become the world's pre-eminent free soloist, traveling around the world to scale seemingly unscalable mountains.
—
G. Allen Johnson
Love words? Need even more definitions?
Merriam-Webster unabridged



