Definition of mitigator in US English:

mitigator

noun

  • 1A person or thing that makes something bad less severe, serious, or painful.

    ‘we're holding bonds as a mitigator of risk’
    1. 1.1 Something that lessens the gravity of an offense or mistake.
      ‘the law lists a dozen mitigators, such as mental problems the defendant was suffering’

Pronunciation

mitigator

/ˈmɪdəˌɡeɪdər//ˈmidəˌɡādər/