pleonastic

noun

1. the use of more words than are necessary for the expression of an idea; redundancy (Ex.: “plenty enough”)
2. an instance of this
3. a redundant word or expression

Etymology: LL pleonasmus < Gr pleonasmos < pleonazein, to be in excess < pleon, neut. of pleōn, more, compar. of polys, much: see poly-