1. bring out or take advantage of
'harness' is a set of straps or leads which are used to prevent and animal from escaping or are used to guide or control them. You can also have a 'safety harness' which is designed to protect someone from hurting themselves too badly in the event of a fall or an accident. The verb 'to harness' can mean to put a harness on something. "Harness the horse, I plan to go riding later." It can also mean to control something or make use of it - such as energy. "We can harness most of the energy we need from the sun."