Definition of adulterer noun from the Oxford Advanced Learner's Dictionary

 

adulterer

 noun
noun
BrE BrE//əˈdʌltərə(r)//
 
; NAmE NAmE//əˈdʌltərər//
 
(formal)
 
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a person who commits adultery Word Origin early 16th cent.: from the obsolete verb adulter ‘commit adultery’, from Latin adulterare ‘debauch, corrupt’, replacing an earlier Middle English noun avouterer, from Old French avoutrer ‘commit adultery’.
See the Oxford Advanced American Dictionary entry: adulterer