Origin: 1580–90; < Late Latinpleonasmus < Greekpleonasmós redundancy, surplus, derivative of pleonázein to be or have more than enough, itself derivative of pleíōn more (see pleo-)
"redundancy in words," 1586, from L.L. pleonasmus, from Gk. pleonasmos, from pleonasein "to be more than enough," from pleon "more," comp. of polys "much," from PIE *ple- (see poly-).