rash (1)EnglishOxford English Thesaurusrash1 noun 1 next day, he broke out in a rash: spots, skin eruption, breakout; hives, heat rash; British nettle rash, nappy rash; technical erythema, exanthema, urticaria, papules, roseola, purpura, pompholyx; rare efflorescence. 2 the incident provoked a rash of articles in the press: series, succession; spate, wave, flood, deluge, torrent; outbreak, plague, epidemic, explosion, run, flurry; rare boutade.rash (2) Oxford Dictionary of English