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:

Deject \De*ject"\, a. [L. dejectus, p. p.]
   Dejected. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

deject
    v 1: lower someone's spirits; make downhearted; "These news
         depressed her"; "The bad state of her child's health
         demoralizes her" [syn: depress, deject, cast down,
         get down, dismay, dispirit, demoralize,
         demoralise] [ant: elate, intoxicate, lift up, pick
         up, uplift]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "deject":
   beat down, cast down, chill, damp, dampen, dampen the spirits,
   darken, dash, demoralize, depress, discourage, dishearten,
   disparage, dispirit, knock down, lower, lower the spirits, oppress,
   press down, sadden, sink, weigh heavy upon, weigh upon