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  1. using all one's resources; complete; total: an all-out effort.
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Origin of all-out

1905–10; adj. use of all out utterly, completely, Middle English al out


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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for all-out

Contemporary Examples

Historical Examples

  • Im going to stick around until the all-out alarm is sounded.

    Joan of the Journal

    Helen Diehl Olds

  • Mitch, who wanted to quit an all-out war, reached for the fusing switch.

    Way of a Rebel

    Walter M. Miller

  • You have had one little love-affair, and never had a good, all-out fight in your life!

    Three Elephant Power

    Andrew Barton 'Banjo' Paterson

  • When he did, they were in for a fight, and money would be a powerful weapon in that all-out battle.

    Double Challenge

    James Arthur Kjelgaard

  • Not just four ordinary flights, but four all-out invasion formations with all the punch the Royal Air Force could put behind them.

    A Yankee Flier with the R.A.F.

    Rutherford G. Montgomery

British Dictionary definitions for all-out


  1. using one's maximum powersan all-out effort
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adverb all out
  1. to one's maximum effort or capacityhe went all out on the home stretch
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012