Source : Webster's Revised Unabridged Dictionary (1913)

Ulterior \Ul*te"ri*or\, a. [L., comp. of ultra, ultro, beyond,
   on the other side, properly cases of an old adjective, formed
   with a comparative suffix, which is akin to OL. uls beyond,
   L. olim formerly, hereafter, orig., at that time, ille that,
   OL. olle, ollus. Cf. {Outrage}.]
   1. Situated beyond, or on the farther side; thither; --
      correlative with hither.

   2. Further; remoter; more distant; succeeding; as, ulterior
      demands or propositions; ulterior views; what ulterior
      measures will be adopted is uncertain.

   {Ulterior object} or {aim}, an object or aim beyond that
      which is avowed.

Ulterior \Ul*te"ri*or\, n.
   Ulterior side or part. [R.] --Coleridge.

Source : WordNet®

ulterior
     adj 1: lying beyond what is openly revealed or avowed (especially
            being kept in the background or deliberately
            concealed); "subterranean motives for murder"; "looked
            too closely for an ulterior purpose in all knowledge"-
            Bertrand Russell [syn: {subterranean}, {subterraneous}]
     2: beyond or outside an area of immediate interest; remote; "a
        suggestion ulterior to the present discussion";
        "without...any purpose, immediate or ulterior"- G.B.Shaw
     3: coming at a subsequent time or stage; "the future president
        entered college at the age of 16"; "awaiting future
        actions on the bill"; "later developments"; "without
        ulterior argument" [syn: {future(a)}, {later(a)}]