The Collaborative International Dictionary of English v.0.48:

Abjection \Ab*jec"tion\ ([a^]b*j[e^]k"sh[u^]n), n. [F.
   abjection, L. abjectio.]
   1. The act of bringing down or humbling. "The abjection of
      the king and his realm." --Joye.
      [1913 Webster]

   2. The state of being rejected or cast out. [R.]
      [1913 Webster]

            An abjection from the beatific regions where God,
            and his angels and saints, dwell forever. --Jer.
                                                  Taylor.
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   3. A low or downcast state; meanness of spirit; abasement;
      degradation.
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            That this should be termed baseness, abjection of
            mind, or servility, is it credible?   --Hooker.
      [1913 Webster]

WordNet (r) 3.0 (2006):

abjection
    n 1: a low or downcast state; "each confession brought her into
         an attitude of abasement"- H.L.Menchken [syn: abasement,
         degradation, abjection]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "abjection":
   abandon, abandonment, corruptedness, corruption, corruptness,
   debasement, decadence, decadency, degeneracy, degenerateness,
   degeneration, degradation, demoralization, depravation,
   depravedness, depravity, dissoluteness, moral pollution,
   moral turpitude, profligacy, reprobacy, rottenness, turpitude