1. (of flora or fauna) in imminent danger of extinction
   "an endangered species"

1. Put in a dangerous, disadvantageous, or difficult position
   "Her actions endangered the entire mission";
   - queer [informal], expose, scupper, peril
    
2. Pose a threat to; present a danger to
   "The pollution is endangering the crops";
   - jeopardize, jeopardise [Brit], menace, threaten, imperil, peril

See also: vulnerable

Type of: affect, be, bear on, bear upon, exist, impact

Encyclopedia: Endangered