Entry 2 senses Webster, 1913 duplicative /do͞op-lĭk'-ət-ĭv/ · du·pli·ca·tive · IPA /djuːˈplɪkətɪv/ 01 a. Having the quality of duplicating or doubling. 1. Having the quality of duplicating or doubling. 2. Having the quality of subdividing into two by natural growth.(Biol.)