To double again; multiply; repeat.In philology, to repeat, as a syllable or the initial part of a syllable (usually a root-syllable). See reduplication.In philology, to be doubled or repeated; undergo reduplication: as, reduplicating verbs.Redoubled; repeated; reduplicative.In botany:Valvate, with the edges folded back so as to project outward: said of petals and sepals in one form of estivation.Describing an estivation so characterized. Also reduplicative.