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cui bono

[koo i boh-noh; English kwee boh-noh, kahy-]
Latin.
  1. for whose benefit?
  2. for what use? of what good?
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for cui bono

cui bono

  1. for whose benefit? for what purpose?
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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 cui bono

a Latin phrase from Cicero. It means "to whom for a benefit," or "who profits by it?" not "to what good purpose?" as is often erroneously claimed. From cui "to? for whom?," an old form preserved here in the dative form of the interrogative pronoun quis "who?" (see who) + bono "good" (see bene-).

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Online Etymology Dictionary, © 2010 Douglas Harper