Source : Webster's Revised Unabridged Dictionary (1913)

Unmeaning \Un*mean"ing\, a.
   1. Having no meaning or signification; as, unmeaning words.

   2. Not indicating intelligence or sense; senseless;
      expressionless; as, an unmeaning face.

            There pride sits blazoned on the unmeaning brow.
                                                  --Trumbull.
      -- {Un*mean"ing*ly}, adv. -- {Un*mean"ing*ness}, n.

Source : WordNet®

unmeaning
     adj : signifying nothing; "insignificant sounds"; "his
           response...is picayune and unmeaning"- R.B. Pearsall
           [syn: {insignificant}]