“PEDANTRY may be defined, for the purpose of this book, as the saying of things in language so learned or so demonstratively accurate as to imply a slur upon the generality, who are not capable or not desirous of such displays. The term, then, is obviously a relative one; my pedantry is your scholarship, his reasonable accuracy, her irreducible minimum of education, & someone else’s ignorance.”
H.W. Fowler, A Dictionary of Modern English Usage