Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Not spoken: indicated tacit approval by smiling and winking.
  • adj. Implied by or inferred from actions or statements: Management has given its tacit approval to the plan.
  • adj. Law Arising by operation of the law rather than through direct expression.
  • adj. Archaic Not speaking; silent.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Done or made in silence; implied, but not expressed; silent; as, tacit consent is consent by silence, or by not interposing an objection.
  • adj. Not derived from formal principles of reasoning; based on induction rather than deduction.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Done or made in silence; implied, but not expressed; silent.

from The Century Dictionary and Cyclopedia

  • Silent; quiescent; giving out no sound.
  • Silently indicated or implied; understood from conditions or circumstances; inferred or inferable; expressed otherwise than by speech; indirectly manifested or communicated; wordless.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. implied by or inferred from actions or statements

Etymologies

Latin tacitus, silent, past participle of tacēre, to be silent.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin tacitus ("that is passed over in silence, done without words, assumed as a matter of course, silent"), from tacere ("to be silent"). (Wiktionary)

Examples

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