Source : Webster's Revised Unabridged Dictionary (1913)

Deictic \Deic"tic\, a. [Gr. deiktiko`s serving to show or point
   out, fr. deikny`nai to show.] (Logic)
   Direct; proving directly; -- applied to reasoning, and
   opposed to {elenchtic} or refutative.

Source : WordNet®

deictic
     adj : relating to or characteristic of a word whose reference
           depends on the circumstances of its use; "deictic
           pronouns"
     n : a word specifying identity or spacial or temporal location
         from the perspective of a speaker or hearer in the
         context in which the communication occurs; "words that
         introduce particulars of the speaker's and hearer's
         shared cognitive field into the message"- R.Rommetveit
         [syn: {deictic word}]