Definition of dangerous in English:

dangerous

Line breaks: dan¦ger|ous
Pronunciation: /ˈdeɪn(d)ʒ(ə)rəs
 
/

adjective

1Able or likely to cause harm or injury: a dangerous animal insecticides which are dangerous to the environment
More example sentences
  • 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.
Synonyms
menacing, threatening, treacherous; savage, wild, vicious, murderous, desperate
rare minacious
1.1Likely to cause problems or to have adverse consequences: it is dangerous to convict on his evidence
More example sentences
  • It is at least as important to challenge the dangerous assumptions of their opponents.
  • Vouchers are stigmatised by their opponents as a dangerous idea of the radical right.
  • Both warn of the dangerous consequences of voting in favour of their opponents.
Synonyms
hazardous, perilous, risky, high-risk, fraught with danger, unsafe, uncertain, unpredictable, precarious, insecure, exposed, vulnerable, touch-and-go, chancy, tricky, treacherous; breakneck, reckless, daredevil; Scottishunchancy
informal warm, dicey, sticky, hairy
British informal dodgy
North American informal gnarly
1.2(Of a drug) addictive or otherwise harmful or illegal: promoting a dangerous drug for profit
More example sentences
  • But as education gets more attainable then people are starting to wake up to the fact that smoking is dangerous.
  • They understand that it is dangerous to smoke; it is dangerous to work in a place where there is smoke.
  • These are serious drugs, with potentially dangerous consequences, but the mood of the ads is upbeat and cheery.

Origin

Middle English (in the senses 'arrogant', 'fastidious', and 'difficult to please'): from Old French dangereus, from dangier (see danger).

Derivatives

dangerously

adverb
More example sentences
  • York City have decided that if they are to dangle dangerously from the trapeze it is better to do it with a safety net in place.
  • It suddenly occurred to me I had paid to put my life in the hands of a man who used to earn a living driving very, very dangerously.
  • The rope was still swaying dangerously as she desperately struggled to regain control of it.

dangerousness

noun
More example sentences
  • After the expiry of the tariff, continued detention depends on elements of dangerousness and risk associated with the objectives of the original sentence [for] murder.
  • When the presumption is not displaced, there is no need for the trial judge to address the issue of whether the vehicle is operable or immovable and/or the issue of dangerousness.
  • But there's no requirement that the law pull the wool over the public's eyes and hide the person's potential dangerousness.

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