reduplicative adjective 1noun 1forms 1 adjective1 •Formed by redoubling; reduplicate, doubleThe loss of the reduplicative syllable in the perfect is sufficiently accounted for by the same occurrence in almost all the modern, and even some of the ancient branches of the Indo-Germanic family. — 1848 noun1 •A word obtained by the process of reduplication. formsreduplicatives