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See more synonyms for presumably on Thesaurus.com
  1. by assuming reasonably; probably: Since he is a consistent winner, he is presumably a superior player.
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Origin of presumably

First recorded in 1640–50; presumable + -ly


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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 presumably

Contemporary Examples

Historical Examples

  • We can only say that they will be different, and presumably loftier ones.


    Theodor Hertzka

  • At least I possess the key of his flat, presumably with his permission.

    The Avenger

    E. Phillips Oppenheim

  • She drew a long breath, presumably of relief, and moved a step forward.

    The Avenger

    E. Phillips Oppenheim

  • Presumably, the Russian troops there had come from Ivangorod.

  • He presumably knew all the employees of his company by sight.

    The Film of Fear

    Arnold Fredericks

British Dictionary definitions for presumably


  1. (sentence modifier) one presumes or supposes thatpresumably he won't see you, if you're leaving tomorrow
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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

Word Origin and History for presumably


1640s, "with presumption, without examination," from presumable + -ly (2). As a qualifier, "probably, as one would presume," from 1830.

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Online Etymology Dictionary, © 2010 Douglas Harper