tacit

Etymology

Borrowed from late Middle French tacite, or from Latin tacitus (“that is passed over in silence, done without words, assumed as a matter of course, silent”), from tacere (“to be silent”).

adj

1. Implied, but not made explicit, especially through silence.
   tacit consent : consent by silence, or by not raising an objection
   He does this by way of a tacit reference to Homer. 1983, Stanley Rosen, Plato’s Sophist: The Drama of Original & Image, page 62
   […] disengagement represents a tacit rejection of governing institutions and processes, especially among young people, […] 2004, Lawrence Pratchett, Vivien Lowndes, editors, Developing Democracy in Europe: An Analytical Summary
2. (logic) Not derived from formal principles of reasoning; based on induction rather than deduction.