[1] : 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. thornahan to be silent,
   icel. thornegja, ohg. dag=en: 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"itly, adv.
   1913 webster

         the tacit and secret theft of abusing our brother in
         civil contracts.                         --jer. taylor.
   1913 webster
see also:
reticent tac"itly 

[2] : WordNet (r) 2.0

tacitly
     adv : in a tacit manner; by unexpressed agreement; "they are
           tacitly expected to work 10 hours a day"

Tacitly >> T Words
Tacitly, definition of term: Tacitly
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