I. har ‧ ness 1 /ˈhɑːnəs, ˈhɑːnɪs $ ˈhɑːr-/ BrE AmE noun [uncountable and countable]
[ Date: 1200-1300 ; Language: Old French ; Origin: herneis 'bags, equipment' ]
1 . a set of leather bands used to control a horse or to attach it to a vehicle it is pulling
2 .
a set of bands used to hold someone in a place or to stop them from falling:
a safety harness
3 . in harness British English doing your usual work:
I felt glad to be back in harness.
4 . in harness (with somebody) British English working closely with another person or group
II. harness 2 BrE AmE verb [transitive]
1 . to control and use the natural force or power of something:
We can harness the power of the wind to generate electricity.
2 . to fasten two animals together, or to fasten an animal to something using a harness
3 . to put a harness on a horse