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.

Accustom \Ac*cus"tom\, v. i.
   1. To be wont. [Obs.] --Carew.

   2. To cohabit. [Obs.]

            We with the best men accustom openly; you with the
            basest commit private adulteries.     --Milton.

Accustom \Ac*cus"tom\, n.
   Custom. [Obs.] --Milton.

Source : WordNet®

accustom
     v : make psychologically or physically used (to something); "She
         became habituated to the background music" [syn: {habituate}]