Definition of "nerdiness"

[A] savage passage of 14th-century invective about the text-obsessed nerdiness of the Florentine bibliophile and friend of Petrarch, Niccolò Niccoli ...

2013 September 14, Jane Shilling, “The Golden Thread: the Story of Writing, by Ewan Clayton, review [print edition: Illuminating language]”, in The Daily Telegraph (Review)‎, page R28