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[prob-uh-blee] /ˈprɒb ə bli/
in all likelihood; very likely:
He will probably attend.
Origin of probably
1525-35; probable + -ly Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for probably
Contemporary Examples
Historical Examples
  • The individual whom I address is probably the most popular beggar in the town.

  • The firing had probably been heard and the wreck of the merchantman seen.

    A Prisoner of Morro Upton Sinclair
  • Had there been, he probably would have invited the visitor to walk to the fire and partake.

    Two Boys in Wyoming Edward S. Ellis
  • Their husbands are not likely ever to be rich men, and will probably be poor for some years to come.

    Deerbrook Harriet Martineau
  • It looked like the part of the Palace where he had lodged when he had been a guest there but it probably wasn't.

    Space Viking Henry Beam Piper
British Dictionary definitions for probably


(sentence modifier; not used with a negative or in a question) in all likelihood or probability: I'll probably see you tomorrow
sentence substitute
I believe such a thing or situation may be the case
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
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Word Origin and History for probably

mid-15c., "plausibly," from probable + -ly (2). As a general purpose qualifier, 1610s.

Online Etymology Dictionary, © 2010 Douglas Harper
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