n. pl. du·plic·i·ties 1. a. Deliberate deceptiveness in behavior or speech. b. An instance of deliberate deceptiveness; double-dealing. 2. The quality or state of being twofold or double. [Middle English duplicite, from Old French, from Late Latin duplicitās, doubleness, from Latin duplex, duplic-, twofold; see dwo- in the Appendix of Indo-European roots.] |
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