(SKIN CONDITION) [noun] [C] - an appearance of a lot of spots on skinI've got a strange rash all over my chest.He came out/up in a rash after he fell in a patch of nettles.My skin came out/up in an itchy rash when I used that cream on my face.If you stay in the sun too long you'll get a heat rash.
RASH
Meaning of RASH in English
Cambridge English vocab. Кембриджский английский словарь. 2012