Longman Dictionary of Contemporary English homepage

Date: 1700-1800
Origin: Early French rache 'small pieces of loose skin', from Latin radere; RAZE

rash

2 noun
     
Related topics: Illness and Disability
rash2 [countable]
1MI a lot of red spots on someone's skin, caused by an illness:
She had a nasty rash on her arm.
come/break out in a rash (=get a rash)
My mother comes out in a rash if she eats seafood.
nappy British English /diaper AmE rash
Most babies get nappy rash at some stage.
a heat rash (=a rash caused by heat)
2

rash of something

informal a large number of unpleasant events, changes etc within a short time [= spate of something]:
There's been a rash of car thefts in the city centre.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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