Entry 1 sense Webster, 1913 Triplicity · Tri·plic·i·ty · IPA /tɹɪˈplɪsɪti/ 01 n. The quality or state of being triple, or threefold; trebleness. 1. The quality or state of being triple, or threefold; trebleness. “In their trinal triplicities on high.” — Spenser.