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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.
Origin of tacit
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. 2015.
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Examples from the Web for tacit
Contemporary Examples
Historical Examples
  • For the time the tacit consent of her position never occurred to her.

    Ben Blair Will Lillibridge
  • Winton and Aunt Rosamund, by tacit agreement, came on alternate afternoons.

    Beyond John Galsworthy
  • As though by tacit agreement those days seemed to have been entirely forgotten.

    The Business of Life Robert W. Chambers
  • Yet they may have a tacit sympathy with the workings of Nature which is denied to us of the town.

    A Room With A View E. M. Forster
  • As if by tacit consent, every incident or development of Lali's life was influenced by his judgment and decision.

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

c.1600, from French tacite, from Latin tacitus "that is passed over in silence, done without words, assumed, silent," prop. past participle of tacere "to be silent," from PIE root *tak- "to be silent" (cf. Gothic þahan, Old Norse þegja "to be silent," Old Norse þagna "to grow dumb," Old Saxon thagian, Old High German dagen "to be silent"). The musical instruction tacet is the 3rd person present singular of the Latin verb.

Online Etymology Dictionary, © 2010 Douglas Harper
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