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[im-prob-uh-bil-i-tee, im-prob-]
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noun, plural im·prob·a·bil·i·ties for 2.
  1. the quality or condition of being improbable; unlikelihood.
  2. something improbable or unlikely.
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Origin of improbability

First recorded in 1590–1600; improbable + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for improbability


1590s, "fact or quality of being improbably;" see improbable + -ity. Meaning "an instance of something improbable" is from 1610s.

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Online Etymology Dictionary, © 2010 Douglas Harper