WordWeb Online

1. Not original; not being or productive of something fresh and unusual
   "the manuscript contained unoriginal emendations"; "his life had been unoriginal, conforming completely to the given pattern"

See also: banal, bromidic, clichéd, cold, commonplace, conventional, corny [informal], dusty, hackneyed, moth-eaten, old-hat [informal], originality, platitudinal, platitudinous, ready-made, secondary, shop-soiled [Brit], shopworn [N. Amer], slavish, stale, stock, threadbare, timeworn, tired, trite, uncreative, well-worn

Antonym: original