Oxford Dictionary English defining vocabulary nounnoun BrE BrE//dɪˈfaɪnɪŋ vəkæbjələri// ; NAmE NAmE//dɪˈfaɪnɪŋ vəkæbjəleri// Add to my wordlistjump to other resultsa set of carefully chosen words used to write the explanations in some dictionariesSee defining vocabulary in the Oxford Learner's Dictionary of Academic EnglishSee defining vocabulary in the Oxford Advanced American DictionaryCheck pronunciation: defining vocabulary oxfordlearnersdictionaries.com