Black's Law Dictionary (2nd edition)dictionaries

Tacit

Silent; not expressed; Implied or Inferred; manifested by the refraining from contradiction or objection; Inferred from the situation nnd circumstances, in the absence of express matter. Thus, tacit con-sent is consent Inferred from the fact that the party kept silence when he had an opportunity to forbid or refuse

Source: Black’s Law Dictionary 2nd Ed (1910)