Definitions of shoulder:

• noun:   narrow edge of land (usually unpaved) along the side of a road
• noun:   the part of the body between the neck and the upper arm
• noun:   a ball-and-socket joint between the head of the humerus and a cavity of the scapula
• noun:   a cut of beef from the shoulder of the animal
• verb:   push with the shoulders

  Example: "He shouldered his way into the crowd"

• verb:   carry a burden, either real or metaphoric

  Example: "Shoulder the burden"

• verb:   lift onto one's shoulders
• name:  A surname (very rare: popularity rank in the U.S.: #78209)