Definition of irritant noun from the Oxford Advanced American Dictionary

     

    irritant

     noun
    noun
    NAmE//ˈɪrətənt//
     
     
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  1. 1(technology) a substance that makes part of your body sore chemical irritants
  2. 2something that makes you annoyed or causes trouble The presence of the army has been a constant irritant.
irritantadjective[usually before noun]
 
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irritant substances