Source : Webster's Revised Unabridged Dictionary (1913)

Saddle \Sad"dle\, v. t. [imp. & p. p. {Saddled}; p. pr. & vb. n.
   {Saddling}.] [AS. sadelian.]
   1. To put a saddle upon; to equip (a beast) for riding.
      ``saddle my horse.'' --Shak.

            Abraham rose up early, . . . and saddled his ass.
                                                  --Gen. xxii.
                                                  3.

   2. Hence: To fix as a charge or burden upon; to load; to
      encumber; as, to saddle a town with the expense of bridges
      and highways.

Saddled \Sad"dled\, a. (Zo["o]l.)
   Having a broad patch of color across the back, like a saddle;
   saddle-backed.

Source : WordNet®

saddled
     adj 1: having a saddle on or being mounted on a saddled animal;
            "saddled and spurred and ready to ride" [ant: {unsaddled}]
     2: subject to an imposed burden; "left me saddled with the
        bill"; "found himself saddled with more responsibility
        than power"