Source : Webster's Revised Unabridged Dictionary (1913)

Accustom \Ac*cus"tom\, v. t. [imp. & p. p. {Accustomed}; p. pr.
   & vb. n. {Accustoming}.] [OF. acostumer, acustumer, F.
   accoutumer; [`a] (L. ad) + OF. costume, F. coutume, custom.
   See {Custom}.]
   To make familiar by use; to habituate, familiarize, or inure;
   -- with to.

         I shall always fear that he who accustoms himself to
         fraud in little things, wants only opportunity to
         practice it in greater.                  --Adventurer.

   Syn: To habituate; inure; exercise; train.

Accustomed \Ac*cus"tomed\, a.
   1. Familiar through use; usual; customary. ``An accustomed
      action.'' --Shak.

   2. Frequented by customers. [Obs.] ``A well accustomed
      shop.'' --Smollett.

Source : WordNet®

accustomed
     adj 1: (often followed by `to') in the habit of or adapted to;
            "accustomed to doing her own work"; "I've grown
            accustomed to her face" [ant: {unaccustomed}]
     2: commonly used or practiced; usual; "his accustomed
        thoroughness"; "took his customary morning walk"; "his
        habitual comment"; "with her wonted candor" [syn: {customary},
         {habitual}, {wonted(a)}]