Meaning of “harness” - Learner’s Dictionary

harness

noun [ C ] uk us /ˈhɑːnɪs/
FOR HORSES

a set of straps fastened around a horse's body and connecting it to a vehicle that it will pull

FOR PEOPLE

a set of strong, flat ropes that fasten equipment to your body or fasten you to a vehicle to prevent you from moving too much:

All climbers must wear safety harnesses and helmets.

(Definition of “harness noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)