A climbing command is a short standard phrase used in climbing to ensure the smooth operation of the climbing system. Standard commands make it possible for climbers to work safely with each other, and for commands to be unambiguously understood when the wind is noisy.

Starting a climb

• "On Belay" or "Climber ready" (US) or "Ready to climb" (UK): the climber wants to know if he is being belayed.
• "Belay on" (US) or "Climb when ready" (UK): the belayer is ready
• "Climbing": the climber beginning his/her ascent
• "Climb on" (US) or "OK" (UK): acknowledgement of "Climbing!"

During a climb

• "Tension", "Up rope", "Take" (US) or "Take in" (UK): remove the slack in the rope between the belayer and the climber
• "Slack", "Down rope", "Give" (US) or "Give out" (UK): add more slack in the rope between the belayer and the climber
• "Falling!" or "Watch me!": climber is falling or about to fall

Ending a climb

• "Off Belay" (US) or "Safe" (UK): the climber has made a safe stance; the belayer can take a rest.
• "Dirt me" (US slang) or "Lower me" (US, UK): the belayer can start lowering off the climber.
• "Got me?": warning signal for the belayer to expect some weight on the rope

Other commands

• "Rope" (US) or "Rope below" (UK): warning signal that the rope will hit the ground seconds after this is heard
• "Rock" (US) or "Below" (UK): warning signal of dislodged rock or dropped equipment falling down.