Entry 2 senses · 2 variants Webster, 1913 Denier /dənyā'/ · De·ni·er · IPA /dəˈnɪə(ɹ)/ n. n. 01 n. One who denies; as, a denier of a fact, or of the faith, or of Christ. 1. One who denies; as, a denier of a fact, or of the faith, or of Christ. 02 n. A small copper coin of insignificant value. 1. A small copper coin of insignificant value. “My dukedom to a beggarly denier.” — Shak.