Middle-name definition
A name that occurs between a person's first name and surname.
noun
A name, commonly another given name or a maiden name, between the first name and the surname.
noun
A name between the given name and the family name or surname.
I go by David but it's my middle name; my full name is William David Mason.
noun
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Other Word Forms
Noun
Singular:
middle-name
Plural:
middle-names