definition of
dangerous

[1] #1 dangerous a. [unsafe] involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions". wn

[2] #2 dangerous s. [grave, grievous, serious, severe, life-threatening] 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". wn