Duplicate

Webster's Dictionary of the English Language

·adj Double; twofold.

II. Duplicate ·vt To make a duplicate of (something); to make a copy or transcript of.

III. Duplicate ·vt To Double; to Fold; to render double.

IV. Duplicate ·vt To divide into two by natural growth or spontaneous action; as, infusoria duplicate themselves.

V. Duplicate ·noun That which exactly resembles or corresponds to something else; another, correspondent to the first; hence, a copy; a transcript; a counterpart.

VI. Duplicate ·noun An original instrument repeated; a document which is the ·same·as another in all essential particulars, and differing from a mere copy in having all the validity of an Original.