'Dangerous' definitions:

Definition of 'dangerous'

From: WordNet
adjective
Involving or causing danger or risk; liable to hurt or harm; "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions" [syn: dangerous, unsafe] [ant: safe]
adjective
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" [syn: dangerous, grave, grievous, serious, severe, life-threatening]

Definition of 'Dangerous'

From: GCIDE
  • Dangerous \Dan"ger*ous\, a. [OE., haughty, difficult, dangerous, fr. OF. dangereus, F. dangereux. See Danger.]
  • 1. Attended or beset with danger; full of risk; perilous; hazardous; unsafe. [1913 Webster]
  • Our troops set forth to-morrow; stay with us; The ways are dangerous. --Shak. [1913 Webster]
  • It is dangerous to assert a negative. --Macaulay. [1913 Webster]
  • 2. Causing danger; ready to do harm or injury. [1913 Webster]
  • If they incline to think you dangerous To less than gods. --Milton. [1913 Webster]
  • 3. In a condition of danger, as from illness; threatened with death. [Colloq.] --Forby. Bartlett. [1913 Webster]
  • 4. Hard to suit; difficult to please. [Obs.] [1913 Webster]
  • My wages ben full strait, and eke full small; My lord to me is hard and dangerous. --Chaucer. [1913 Webster]
  • 5. Reserved; not affable. [Obs.] "Of his speech dangerous." --Chaucer. -- {Dan"ger*ous*ly}, adv. -- {Dan"ger*ous*ness}, n. [1913 Webster]