verb (used with object), du·pli·cat·ed, du·pli·cat·ing.
verb (used without object), du·pli·cat·ed, du·pli·cat·ing.
Origin of duplicate
Examples from the Web for duplicative
Many of these proposals are often duplicative and tied to a news event.
Many of these forms are needed for vital government functions, but others are duplicative, overly complex or obsolete.
But it can hardly be said that the duplicative process is of a distinctively grammatical significance in English.Language|Edward Sapir