Source : Webster's Revised Unabridged Dictionary (1913)

Dismay \Dis*may"\, v. i.
   To take dismay or fright; to be filled with dismay. [Obs.]
   --Shak.

Dismay \Dis*may"\, n. [Cf. OF. esmai, F. ['e]moi. See {Dismay},
   v. t.]
   1. Loss of courage and firmness through fear; overwhelming
      and disabling terror; a sinking of the spirits;
      consternation.

            I . . . can not think of such a battle without
            dismay.                               --Macaulay.

            Thou with a tiger spring dost leap upon thy prey,
            And tear his helpless breast, o'erwhelmed with wild
            dismay.                               --Mrs.
                                                  Barbauld.

   2. Condition fitted to dismay; ruin. --Spenser.

   Syn: Dejection; discouragement; depression; fear; fright;
        terror; apprehension; alarm; affright.

Dismay \Dis*may"\, v. t. [imp. & p. p. {Dismayed}; p. pr. & vb.
   n. {Dismaying}.] [OE. desmaien, dismaien, OF. esmaier; pref.
   es- (L. ex) + OHG. magan to be strong or able; akin to E.
   may. In English the pref. es- was changed to dis- (L. dis-).
   See {May}, v. i.]
   1. To disable with alarm or apprehensions; to depress the
      spirits or courage of; to deprive or firmness and energy
      through fear; to daunt; to appall; to terrify.

            Be not afraid, neither be thou dismayed. --Josh. i.
                                                  9.

            What words be these? What fears do you dismay?
                                                  --Fairfax.

   2. To render lifeless; to subdue; to disquiet. [Obs.]

            Do not dismay yourself for this.      --Spenser.

   Syn: To terrify; fright; affright; frighten; appall; daunt;
        dishearthen; dispirit; discourage; deject; depress. --
        To {Dismay}, {Daunt}, {Appall}. Dismay denotes a state
        of deep and gloomy apprehension. To daunt supposes
        something more sudden and startling. To appall is the
        strongest term, implying a sense of terror which
        overwhelms the faculties.

              So flies a herd of beeves, that hear, dismayed,
              The lions roaring through the midnight shade.
                                                  --Pope.

              Jove got such heroes as my sire, whose soul No
              fear could daunt, nor earth nor hell control.
                                                  --Pope.

              Now the last ruin the whole host appalls; Now
              Greece has trembled in her wooden walls. --Pope.

Source : WordNet®

dismay
     n 1: the feeling of despair in the face of obstacles [syn: {discouragement},
           {disheartenment}]
     2: fear resulting from the awareness of danger [syn: {alarm}, {consternation}]
     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}, {dispirit}, {demoralize}, {demoralise}]
          [ant: {elate}]
     2: fill with apprehension or alarm; cause to be unpleasantly
        surprised; "I was horrified at the thought of being late
        for my interview"; "The news of the executions horrified
        us" [syn: {alarm}, {appal}, {appall}, {horrify}]