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• n  something additional of the same kind
• n  a copy that corresponds to an original exactly
  he made a duplicate for the files
• v  make or do or perform again
• v  duplicate or match
• v  make a duplicate or duplicates of
  Could you please duplicate this letter for me?
• v  increase twofold
• s  identically copied from an original
  a duplicate key
• s  being two identical

• Her birth set off a race in laboratories around the world to duplicate the breakthrough.
• Succession is always a thorny topic, but Li's case is especially sensitive because of his reputation as a brilliant dealmaker whose instincts may be impossible to duplicate.
• Hollywood was a robust industry, but unlike others it didn't duplicate its most popular products.

• extra
• duplication
• reduplicate
• double
• repeat
• replicate
• twin
• parallel
• matching
• twinned

News & Articles

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• Yesterdays June 23
  75 years ago (1938) Mrs. James W. Byrd, Jr., was hostess to the Wednesday Duplicate Club at her home on Locust Avenue Wednesday afternoon. Vases and baskets of roses and other garden flowers were attractively placed in the entrance hall and library.
  June 23, 2013 - The Log Cabin Democrat
• Putin mocks Patriots owner by saying duplicate Super Bowl ring should be made
  You want your ring back, Bob? Nyet a chance! A condescending Vladimir Putin yesterday said he never even saw Patriots owner Robert Kraft’s Super Bowl ring — and declared the best solution to the “complicated international problem” would be to make him a duplicate. “If it is so precious to...
  June 22, 2013 - New York Post
• Duplicate Bridge Results
  Twin Falls Duplicate Bridge
  June 16, 2013 - The Times-News

Quotes

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• Fidel Castro in Washington Post
  Just yesterday, Bush bragged about having won the battle over his adversaries in Congress,Castro wrote in the wandering four-page statement. "He has $100 billion, all the money he needs to duplicate, however he wishes, the sending of...
• President Bush in Times Online
  Mr Bush said: "The wrong way is to raise taxes, duplicate mandates, or demand sudden and drastic emissions cuts that have no chance of being realised and every chance of hurting our economy."
• Dany Heatley in USA Today
  I thought we came out pretty good the first 10 minutes,Heatley said. "After a layoff, you can't duplicate game situations. I don't think we're using it as an excuse, I just don't think we played up to our capabilities."