Definitions of dangerous

1. Dangerousness.

2. 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"

3. Causing danger; ready to do harm or injury.

4. In a condition of danger, as from illness; threatened with death.

5. Hard to suit; difficult to please.

6. Reserved; not affable.

7. Unsafe; involving, or beset with, danger; ready to do harm or injury; perilous; hazardous.

8. Full of danger: unsafe: insecure.

9. Full of danger; unsafe.

10. Fraught with danger; threatening danger; unsafe.

11. Unsafe; perilous; full of danger.