The Collaborative International Dictionary of English v.0.48:

Barefaced \Bare"faced`\ (b[^a]r"f[=a]st`), a.
   1. With the face uncovered; not masked. "You will play
      barefaced." --Shak.
      [1913 Webster]

   2. Without concealment; undisguised. Hence: Shameless;
      audacious; as, a barefaced lie. "Barefaced treason." --J.
      Baillie.
      [1913 Webster]

WordNet (r) 3.0 (2006):

barefaced
    adj 1: with no effort to conceal; "a barefaced lie" [syn:
           bald, barefaced]
    2: unrestrained by convention or propriety; "an audacious trick
       to pull"; "a barefaced hypocrite"; "the most bodacious
       display of tourism this side of Anaheim"- Los Angeles Times;
       "bald-faced lies"; "brazen arrogance"; "the modern world with
       its quick material successes and insolent belief in the
       boundless possibilities of progress"- Bertrand Russell [syn:
       audacious, barefaced, bodacious, bald-faced,
       brassy, brazen, brazen-faced, insolent]

Moby Thesaurus II by Grady Ward, 1.0:

52 Moby Thesaurus words for "barefaced":
   arrant, audacious, aweless, bare-ankled, bare-armed, bare-backed,
   bare-breasted, bare-chested, bare-handed, bare-headed, bare-legged,
   bare-necked, blatant, blunt, bold, bold as brass, boldfaced,
   brassy, brazen, brazenfaced, candid, cheeky, downright, forward,
   frank, immodest, impertinent, impudent, indecent, indecorous,
   insolent, lost to shame, manifest, open, out-and-out, outright,
   overbold, pert, plain, saucy, shameless, sheer, swaggering,
   topless, unabashed, unalloyed, unblushing, unconcealed, undiluted,
   undisguised, unmitigated, unseemly