The Collaborative International Dictionary of English v.0.48:

Deject \De*ject"\, v. t. [imp. & p. p. Dejected; p. pr. & vb.
   n. Dejecting.] [L. dejectus, p. p. of dejicere to throw
   down; de- + jacere to throw. See Jet a shooting forth.]
   1. To cast down. [Obs. or Archaic]
      [1913 Webster]

            Christ dejected himself even unto the hells.
                                                  --Udall.
      [1913 Webster]

            Sometimes she dejects her eyes in a seeming
            civility; and many mistake in her a cunning for a
            modest look.                          --Fuller.
      [1913 Webster]

   2. To cast down the spirits of; to dispirit; to discourage;
      to dishearten.
      [1913 Webster]

            Nor think, to die dejects my lofty mind. --Pope.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Dejected \De*ject"ed\, a.
   Cast down; afflicted; low-spirited; sad; as, a dejected look
   or countenance. -- De*ject"ed*ly, adv. --
   De*ject"ed*ness, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dejected
    adj 1: affected or marked by low spirits; "is dejected but
           trying to look cheerful" [ant: elated]