Definition of "tripline" []

• A concealed wire or string that sets off an alarm or activates a trap when tripped. (noun)

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• "I had lost all the progress I had made, and was now in an even worse situation because the tripline was gone and the main rope to the sea anchor was too thick for me to clip it into the carabiner."
• "There was also the problem that I had now lost the tripline and also the third, emergency line that led from the main rope back into the cockpit."
• "While I was explaining who I was and what I needed done, I looked out and saw that the tripline, instead of being clipped into the carabiner, had snapped."