The Collaborative International Dictionary of English v.0.48:

Meekness \Meek"ness\, n.
   The quality or state of being meek.
   [1913 Webster]

WordNet (r) 3.0 (2006):

meekness
    n 1: the feeling of patient, submissive humbleness [syn:
         meekness, submission]
    2: a disposition to be patient and long suffering [syn:
       meekness, subduedness]

The Devil's Dictionary (1881-1906):

MEEKNESS, n.  Uncommon patience in planning a revenge that is worth
while.

    M is for Moses,
        Who slew the Egyptian.
    As sweet as a rose is
    The meekness of Moses.
    No monument shows his
        Post-mortem inscription,
    But M is for Moses
        Who slew the Egyptian.
                                           _The Biographical Alphabet_