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[tas-it] /ˈtæs ɪt/
understood without being openly expressed; implied:
tacit approval.
silent; saying nothing:
a tacit partner.
unvoiced or unspoken:
a tacit prayer.
1595-1605; < Latin tacitus silent, past participle of tacēre to be silent (cognate with Gothic thahan; akin to Old Norse thegja)
Related forms
tacitly, adverb
tacitness, noun
1. unexpressed, unspoken, unsaid, implicit.
1. expressed. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for tacit
  • All effective writers and speakers have learned the convention of tacit knowledge.
  • The first category has been around for a long time, as preparing, forming individuals was the tacit aim of education.
  • The tacit postponement has also come amid urgent reports warning of heightened landslide risks.
  • These raids are sometimes conducted with the tacit approval of the police.
  • It can be simply a matter of people's walking around in tacit agreement and full comfort with the status quo.
  • Now this would not be, as the protesters and their tacit supporters must reckon, a victory for the poor or for the human spirit.
  • The announcement reminded investors that tacit sovereign guarantees may be worthless.
  • Meanwhile all parties seem close to a tacit understanding that there will be no coup.
  • Politicians are constantly dialing for dollars, with the tacit understanding that the generous will be rewarded.
  • It was not a choice, but an automatic shifting of gears, a tacit agreement between my body and my brain.
British Dictionary definitions for tacit


implied or inferred without direct expression; understood a tacit agreement
created or having effect by operation of law, rather than by being directly expressed
Derived Forms
tacitly, adverb
tacitness, noun
Word Origin
C17: from Latin tacitus, past participle of tacēre to be silent
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 tacit
1604, from Fr. tacite, from L. tacitus "that is passed over in silence, done without words, assumed, silent," prop. pp. of tacere "to be silent," from PIE base *tak- "to be silent" (cf. Goth. þahan, O.N. þegja "to be silent," O.N. þagna "to grow dumb," O.S. thagian, O.H.G. dagen "to be silent"). The musical instruction tacet is the 3rd person present sing. of the L. verb.
Online Etymology Dictionary, © 2010 Douglas Harper
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