middle name noun
plural ∼ names 1 [count] : a name between a person's first name and family name
▪ President John F. Kennedy's middle name was “Fitzgerald.” 2 [singular] informal : a word that accurately describes a person's qualities
▪ Patience is her middle name. [=she is a very patient person]
▪ President John F. Kennedy's middle name was “Fitzgerald.”
▪ Patience is her middle name. [=she is a very patient person]
