Source : Webster's Revised Unabridged Dictionary (1913)

Wordless \Word"less\, a.
   Not using words; not speaking; silent; speechless. --Shak.

Source : WordNet®

wordless
     adj : expressed without speech; especially because words would be
           inappropriate or inadequate; "a mute appeal"; "a silent
           curse"; "best grief is tongueless"- Emily Dickinson;
           "the words stopped at her lips unsounded"; "unspoken
           grief"; "choking exasperation and wordless shame"-
           Thomas Wolfe [syn: {mute}, {tongueless}, {unspoken}]