n.something to which a mountain climber's rope can be secured

v.

turn a rope round an object or person in order to secure it or him

fasten a boat to a bitt, pin, or cleat

Self-belaying descending apparatus
MUST CONCENTRATE ON BELAYING
Belaying apparatus with friction claw for climbing
Design Details About Belaying Pins
Multifunctional belaying device for a rope
A Tale of Two Coasts...and Some Belaying Pins
Computer mathematical models in belaying techniques
The Dynamics of Belaying Two-Person Loads in a High Ropes Course Environment
A Belaying Pin and a Biscuit : Labour Movements and Narrative in The Nigger of the "Narcissus"
The effects of participant belaying on self efficacy of college students in indoor rock climbing