Source : Webster's Revised Unabridged Dictionary (1913)

Retire \Re*tire"\, v. t. [imp. & p. p. {Retired}; p. pr. & vb.
   n. {Retiring}.] [F. retirer; pref. re- re- + tirer to draw.
   See {Tirade}.]
   1. To withdraw; to take away; -- sometimes used reflexively.

            He . . . retired himself, his wife, and children
            into a forest.                        --Sir P.
                                                  Sidney.

            As when the sun is present all the year, And never
            doth retire his golden ray.           --Sir J.
                                                  Davies.

Retiring \Re*tir"ing\, a.
   1. Reserved; shy; not forward or obtrusive; as, retiring
      modesty; retiring manners.

   2. Of or pertaining to retirement; causing retirement; suited
      to, or belonging to, retirement.

   {Retiring board} (Mil.), a board of officers who consider and
      report upon the alleged incapacity of an officer for
      active service.

   {Retiring pension}, a pension granted to a public officer on
      his retirement from office or service.

Source : WordNet®

retiring
     adj 1: not blatant or overly aggressive in manner or appearance; "a
            retiring disposition" [syn: {unassertive}]
     2: moving toward a position farther from the front; "the
        receding glaciers of the last ice age"; "retiring fogs
        revealed the rocky coastline" [syn: {receding}]
     3: not arrogant or presuming; "unassuming to a fault, skeptical
        about the value of his work"; "a shy retiring girl" [syn:
        {unassuming}]
     4: of a person who has held and relinquished a position or
        office; "a retiring member of the board" [syn: {past(a)},
        {preceding(a)}, {retiring(a)}]