Poacher/ˈpəʊtʃər/ Definition 1 of 3Pro Tip 1/3Illegal Activity Poacher in this sense always relates to illegal hunting or fishing, not just any hunting. The man was arrested and charged as a poacher. Pro Tip 2/3Endangered Species Often, poachers target animals that are endangered or protected by law. Poachers were caught trying to capture a pair of endangered tigers. Pro Tip 3/3Conservation Threat Poachers are seen as a threat to wildlife conservation efforts and biodiversity. Rangers are on high alert for poachers who threaten local wildlife.