<p><strong>Adjective</strong></p><ul><li>Threatened with a danger: endangered lives of trapped coal miners.</li><li>Biology, Ecology: Generally perceived as threatened with extinction: In 1967, the U.S. government declared the bald eagle endangered, but the national bird’s population recovery since then has been remarkable.</li><li>(Of a threatened plant or animal species) Having a very high risk of extinction, second only to the status of critically endangered, as categorized by the IUCN Red List: EN. There are more than 3,600 endangered plant species throughout the world.</li></ul>