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English definition of “rash”

rash

noun uk   /ræʃ/ us  

rash noun (SKIN CONDITION)

C2 [C or U] a lot of small red spots on the skin: I've got an itchy rash all over my chest. He came out/up in a rash after he fell in a patch of nettles. If you stay in the sun too long you'll get (a) heat rash.

rash noun (LARGE NUMBER)

a rash of sth a large number of unpleasant events of the same type: There has been a rash of robberies/accidents/complaints in the last two months.

rash

adjective uk   /ræʃ/ us  
C2 careless or unwise, without thought for what might happen or result: That was a rash decision - you didn't think about the costs involved. [+ to infinitive] I think it was a bit rash of them to get married when they'd only known each other for a few weeks.
rashly
adverb uk   /ˈræʃ.li/ us  
rashness
noun [U] uk   /ˈræʃ.nəs/ us  
In a moment of rashness, I agreed to do a parachute jump for charity.
(Definition of rash from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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