- 1 to put a harness on a horse or other animal; to attach a horse or other animal to something with a harness harness something to harness a horse harness something to something We harnessed two ponies to the cart. (figurative) In some areas, the poor feel harnessed to their jobs.
- 2harness something to control and use the force or strength of something to produce power or to achieve something attempts to harness the sun's rays as a source of energy We must harness the skill and creativity of our workforce.
NAmE//ˈhɑrnəs//Verb Forms present simple I / you / we / they harness
he / she / it harnesses
past simple harnessed
-ing form harnessing