In the definition of "take" in the Endangered Species Act, harass means an intentional or negligent act or omission which creates the likelihood of injury to wildlife by annoying it to such an extent as to significantly disrupt normal behavioral patterns, which include but are not limited to breeding, feeding, or sheltering
If someone harasses you, they trouble or annoy you, for example by attacking you repeatedly or by causing you as many problems as they can. A woman reporter complained one of them sexually harassed her in the locker room
exhaust by attacking repeatedly; "harass the enemy" annoy continually or chronically; "He is known to harry his staff when he is overworked"; "This man harasses his female co-workers