from
The Collaborative International Dictionary of English v.0.48
Tacit \Tac"it\, a. [L. tacitus, p. p. of tacere to be silent, to
pass over in silence; akin to Goth. [thorn]ahan to be silent,
Icel. [thorn]egja, OHG. dag[=e]n: cf. F. tacite. Cf.
{Reticent}.]
Done or made in silence; implied, but not expressed; silent;
as, tacit consent is consent by silence, or by not
interposing an objection. -- {Tac"it*ly}, adv.
[1913 Webster]
The tacit and secret theft of abusing our brother in
civil contracts. --Jer. Taylor.
[1913 Webster]