Definition of dangerous in English:

dangerous

adjective

1Able or likely to cause harm or injury.
‘a dangerous animal’
‘insecticides which are dangerous to the environment’
- ‘It was very dark and the terrain was dangerous so it was decided that it was too dangerous to carry on with the search.’
- ‘The things he says are dangerous to certain members of our community.’
- ‘It is very dangerous to look directly into the sun.’
- ‘The Yugoslavian situation was deemed to be too complicated and too dangerous to resolve by firm action.’
- ‘In short, land mines are nasty, out-of-date, and dangerous to your own side.’
- ‘She said she thought rubbish could be dangerous to young children as well as animals.’
- ‘They say the weather had made it difficult to gain access to the site and scaffolding too dangerous to stand on.’
- ‘It's too dangerous to go out anywhere but there's no point anyway because all the shops are closed.’
- ‘When he was stopped, he said that the police car had been too close behind him and that had been dangerous to him.’
- ‘The elderly find it dangerous to cross the road at a pelican crossing or a zebra crossing because of speeding vehicles.’
- ‘Experiments that are too dangerous to do in a classroom can be conducted in a virtual setting online.’
- ‘It is also more dangerous to travel by train or Tube than by airline.’
- ‘First a load of rocks had to be dropped on the drive, turning it from dangerous to pretty much impassable.’
- ‘The match was cancelled after both umpires and captains agreed it would be dangerous to play on a dry pitch.’
- ‘The conditions he began fighting in 1969 are much worse today and far more dangerous to many more people.’
- ‘Eighteen cabbies have been banned from picking up fares after their vehicles were found to be too dangerous to drive.’
- ‘They are also dangerous to the user, as the weakened barrel can explode if used with live ammunition.’
- ‘It decided, no doubt on good grounds, that these men were far too dangerous to be allowed at liberty.’
- ‘The furrows are over an inch deep and it is far too dangerous to play on, it would be very easy for someone to break their leg.’
- ‘He knew that the alternative to his kind of democracy lay with men far more dangerous to the country than he.’
menacing, threatening, treacherous
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1. 1.1Likely to cause problems or to have adverse consequences.
  ‘it is dangerous to convict on his evidence’
  ‘It is at least as important to challenge the dangerous assumptions of their opponents.’
  ‘Both warn of the dangerous consequences of voting in favour of their opponents.’
  ‘If that were the extent of their meddling that would be bad enough but there have been dark and dangerous consequences.’
  ‘In the event of a major flood this could have dangerous consequences for those who live in the surrounding area.’
  ‘On the question of image, any paternal counsel given may have dangerous consequences.’
  ‘How could anyone support this frankly ridiculous criminally dangerous reckless and rash point of view?’
  ‘Such methods brand those in power as reckless and dangerous political provocateurs.’
  ‘This is a dangerous dynamic indeed, with very real consequences for people on the receiving end.’
  ‘Ideas may be dangerous, and may have had bad consequences, but it does not follow that they cannot have good uses.’
  ‘Is it wise or even just, he asks, to expose our children to cultural viruses that are irrational and dangerous?’
  ‘It should be exposed for what it is, which is dangerous delusion at best.’
  ‘What follows exposes the work's innards and the dangerous ideology that informs it.’
  ‘Running away was less dangerous than rebellion, but it was still a hazardous enterprise.’
  ‘What can you do to reassure people that voting is not going to be dangerous to them?’
  ‘It's very dangerous to use the language of the culture to interpret the gospel.’
  ‘It is really dangerous to apply stereotypes on such immensely diverse community.’
  ‘It's always dangerous to speculate on when an incident might or might not occur.’
  ‘It is, of course, always dangerous to conclude too much from early evidence.’
  ‘The LibDem leader told the Sunday Herald it would be dangerous to silence opposing points of view.’
  hazardous, perilous, risky, high-risk, fraught with danger, unsafe, uncertain, unpredictable, precarious, insecure, exposed, vulnerable, touch-and-go, chancy, tricky, treacherous
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