serving to distinguish or identify a species or group; "the distinguishing mark of the species is its plumage"; "distinctive tribal tattoos"; "we were asked to describe any identifying marks or distinguishing features"
causing fear or anxiety by threatening great harm; "a dangerous operation"; "a grave situation"; "a grave illness"; "grievous bodily harm"; "a serious wound"; "a serious turn of events"; "a severe case of pneumonia"; "a life-threatening disease"
involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions"