[ 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

tac·it·ly, adverbtac·it·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for tacit

British Dictionary definitions for tacit


/ (ˈtæsɪt) /


implied or inferred without direct expression; understooda tacit agreement
created or having effect by operation of law, rather than by being directly expressed

Derived Forms

tacitly, adverbtacitness, noun

Word Origin for tacit

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