Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To double.
  • intransitive verb To repeat.
  • intransitive verb Games To double the doubling bid of (an opponent) in bridge.
  • intransitive verb To become twice as great.
  • intransitive verb Games To double a double in bridge.

from The Century Dictionary.

  • In bridge, to double again. After the dealer's side has declared, if either adversary doubles, the maker of the trump or his partner can redouble. See bridge.
  • To double again or repeatedly; multiply; repeat often.
  • To increase by repeated or continued additions.
  • To repeat in return.
  • To become twice as much; be repeated; become greatly or repeatedly increased.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb To double again or repeatedly; to increase by continued or repeated additions; to augment greatly; to multiply.
  • intransitive verb To become greatly or repeatedly increased; to be multiplied; to be greatly augmented.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb transitive To double, especially to double again; to increase considerably; to multiply; to intensify.
  • verb bridge, backgammon To double an opponent's doubling bid.
  • verb intransitive To become twice as big.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb make twice as great or intense
  • verb double in magnitude, extent, or intensity
  • verb double again

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

re- +‎ double.

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Examples

  • President Barack Obama, in his State of the Union address Tuesday, called on Congress to "redouble" efforts to rebuild roads, bridges and other infrastructure, even as it cuts elsewhere.

    Uphill Battle for Panel Chief on Transportation Funding Melanie Trottman 2011

  • A month after taking charge in Afghanistan, Gen. David Petraeus on Wednesday issued an updated tactical directive governing the use of force by U.S. and NATO troops, urging them to "redouble" their efforts to protect Afghan civilians.

    Petraeus issues new rules on use of force 2010

  • Senior U.S. officials said the Obama administration would "redouble" its efforts to get Israel to ease the blockade.

    Israel, Under Pressure,Weighs Easing Gaza Blockade 2010

  • Minister Gordon Brown, the parties said they had resolved to "redouble" their efforts to secure the publication of Zimbabwe's April 29 election results.

    ANC Daily News Briefing 2008

  • On Wednesday Barnardo, s said the UK Government was not on target to meet its pledge, and called on both governments to "redouble" their efforts.

    What is really important ? Valleys Mam 2007

  • On Wednesday Barnardo, s said the UK Government was not on target to meet its pledge, and called on both governments to "redouble" their efforts.

    Archive 2007-06-03 Valleys Mam 2007

  • In her newest stint, providing false promises and pernicious rhetoric, Rice vowed to "redouble" US efforts to "improve conditions for the Palestinian people."

    Hazardous Intent: US Brokers in Palestine 2006

  • "We will make sure this is fully paid for," Mr. Obama said as he grandly pledged to "redouble" road and bridge repair.

    Redskins Insider Podcast -- The Washington Post Post 2011

  • The abduction and murder of Cavazos -- the fifth Mexican mayor believed to have been killed by narco-criminals -- outraged officials all the way up to President Felipe Calderon, who said he would "redouble" his crackdown on the gangs.

    Yahoo! News: Business - Opinion 2010

  • Pelosi tells panel chairmen to 'redouble' efforts to chip away at federal budget

    Home/News 2010

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