What is the meaning of saddle?

noun

• A seat for the rider of a horse or camel.
• A pass or ridge that slopes gently between two peaks (is shaped like a saddle.
  • synonyms: saddleback
• Cut of meat (especially mutton or lamb) consisting of part of the backbone and both loins.
• A piece of leather across the instep of a shoe.
• A seat for the rider of a bicycle.
  • synonyms: bicycle seat
• Posterior part of the back of a domestic fowl.

verb

• Put a saddle on.
  • usage: "saddle the horses"
• Load or burden; encumber.
  • usage: "he saddled me with that heavy responsibility"
• Impose a task upon, assign a responsibility to.
  • usage: "He charged her with cleaning up all the files over the weekend"
  • synonyms: charge, burden