American English

Definition of middle name noun from the Oxford Advanced American Dictionary

 

middle name

 noun
noun
 
 
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  • a name that comes between your first name and your family name
  • Idioms
    be somebody's middle name (informal)
     
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    used to say that someone has a lot of a particular quality “Patience” is my middle name!
    See the Oxford Advanced Learner's Dictionary entry: middle name