Definition of dangerous adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈdeɪndʒərəs//
; NAmE NAmE//ˈdeɪndʒərəs//
Describing work, Terrorism
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  • likely to injure or harm somebody, or to damage or destroy something a dangerous road/illness/sport dangerous levels of carbon monoxide The prisoners who escaped are violent and dangerous. The situation is highly dangerous. (British English) a conviction for dangerous driving dangerous for somebody The traffic here is very dangerous for children. dangerous for somebody to do something It would be dangerous for you to stay here. See related entries: Describing work, Terrorism
  • Word OriginMiddle English (in the senses ‘arrogant’, ‘fastidious’, and ‘difficult to please’): from Old French dangereus, from dangier, based on Latin dominus ‘lord’.Extra examples Raising income tax is considered politically dangerous. The escapee is not considered dangerous. The ice is making the roads very dangerous tonight. The situation could get dangerous. This route through the mountains is notoriously dangerous. This treatment is extremely dangerous for the mother. a highly dangerous situation not dangerous to humans Flu can be a dangerous illness for some people, including the very young. He received a conviction for dangerous driving. The detector alerts residents to dangerous levels of carbon monoxide in the air. The plans would create more traffic and be dangerous for children and old people. We’d be on dangerous ground if we asked about race or religion.Idioms a situation or subject that is likely to make somebody angry, or that involves risk We'd be on dangerous ground if we asked about race or religion. See related entries: Anger
    See the Oxford Advanced American Dictionary entry: dangerous