The Collaborative International Dictionary of English v.0.48:

boldface \boldface\ n.
   a typeface with thick heavy lines; -- also called
   bold-faced.
   [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Bold-faced \Bold"-faced`\, a.
   1. Somewhat impudent; lacking modesty; as, a bold-faced
      woman.
      [1913 Webster]

            I have seen enough to confute all the bold-faced
            atheists of this age.                 --Bramhall.
      [1913 Webster]

   2. (Print.) Having a conspicuous or heavy face; -- also
      called boldface.
      [1913 Webster]

   Note: This line is bold-faced nonpareil.
         [1913 Webster]