Source : Webster's Revised Unabridged Dictionary (1913)

Utilitarian \U*til`i*ta"ri*an\, a. [See {Utility}.]
   1. Of or pertaining to utility; consisting in utility; ?iming
      at utility as distinguished from beauty, ornament, etc.;
      sometimes, reproachfully, evincing, or characterized by, a
      regard for utility of a lower kind, or marked by a sordid
      spirit; as, utilitarian narrowness; a utilitarian
      indifference to art.

   2. Of or pertaining to utilitarianism; supporting
      utilitarianism; as, the utilitarian view of morality; the
      Utilitarian Society. --J. S. Mill.

Utilitarian \U*til`i*ta"ri*an\, n.
   One who holds the doctrine of utilitarianism.

         The utilitarians are for merging all the particular
         virtues into one, and would substitute in their place
         the greatest usefulness, as the alone principle to
         which every question respecting the morality of actions
         should be referred.                      --Chalmers.

         But what is a utilitarian? Simply one who prefers the
         useful to the useless; and who does not? --Sir W.
                                                  Hamilton.

Source : WordNet®

utilitarian
     adj 1: having a useful function; "utilitarian steel tables" [syn: {useful}]
     2: having utility often to the exclusion of values; "plain
        utilitarian kitchenware"

utilitarian
     n : someone who believes that the value of a thing depends on
         its utility