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[suh-gey-shuh s] /səˈgeɪ ʃəs/
having or showing acute mental discernment and keen practical sense; shrewd:
a sagacious lawyer.
Obsolete. keen of scent.
Origin of sagacious
1600-10; sagaci(ty) + -ous
Related forms
sagaciously, adverb
sagaciousness, noun
quasi-sagacious, adjective
quasi-sagaciously, adverb
supersagacious, adjective
supersagaciously, adverb
supersagaciousness, noun
unsagacious, adjective
unsagaciously, adverb
unsagaciousness, noun
1. wise, sage, discerning, clever, intelligent, judicious, acute, sharp, keen, perspicacious.
1. unwise. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for sagacious
Contemporary Examples
Historical Examples
  • Said that sagacious publicist: The truth is, it is a contest for power, not for liberty.

    The Life of Jefferson Davis Frank H. Alfriend
  • Odysseus, the sagacious, made answer: "Go in before me, and I will follow by and by."

  • The exhibition of the evidence showed how penetrating, how sagacious, as well as how industrious, malice can be.

    Deerbrook Harriet Martineau
  • He was courageous, energetic, sagacious, and universally esteemed.

  • The parliamentary bore is not considered a sagacious animal, except in one particular.

  • Therefore many more of them will be well-informed than sagacious.

    This Simian World Clarence Day
  • Shall we ascribe them to the wise, sagacious, and patriotic men, who guided our councils and led our armies?

  • sagacious brute, he knows my wants, and is sure to bring me something.

    The Rival Crusoes W.H.G. Kingston
  • The competent person is the sagacious (not to say sly) old gentleman—whom we used to call the Governor.

    The Legacy of Cain Wilkie Collins
British Dictionary definitions for sagacious


having or showing sagacity; wise
(obsolete) (of hounds) having an acute sense of smell
Derived Forms
sagaciously, adverb
sagaciousness, noun
Word Origin
C17: from Latin sagāx, from sāgīre to be astute
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 sagacious

c.1600, from Latin sagacem (nominative sagax) "of quick perception;" see sagacity. Related: Sagaciously.

Online Etymology Dictionary, © 2010 Douglas Harper
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