Definitions of saddle:

• noun:   posterior part of the back of a domestic fowl
• noun:   a seat for the rider of a horse
• noun:   a piece of leather across the instep of a shoe
• noun:   cut of meat (especially mutton or lamb) consisting of part of the backbone and both loins
• noun:   a seat for the rider of a bicycle
• noun:   a pass or ridge that slopes gently between two peaks (is shaped like a saddle)
• verb:   load or burden; encumber

  Example: "He saddled me with that heavy responsibility"

• verb:   put a saddle on

  Example: "Saddle the horses"

• verb:   impose a task upon, assign a responsibility to