nerdom in English dictionary nerdom Meanings and definitions of "nerdom" (colloquial, rare) The attitudes and behaviours of a nerd; nerdiness. noun (colloquial, rare) The attitudes and behaviours of a nerd; nerdiness. noun (colloquial, rare) Nerds, considered as a group. more Grammar and declension of nerdom nerdom ( uncountable) nerdom (uncountable) more Sample sentences with "nerdom" Declension Stem Try again Authors