Definitions of side:

• noun:   an extended outer surface of an object

  Example: "He turned the box over to examine the bottom side"

• noun:   either the left or right half of a body

  Example: "He had a pain in his side"

• noun:   an aspect of something (as contrasted with some other implied aspect)

  Example: "He was on the heavy side"

• noun:   an opinion that is held in opposition to another in an argument or dispute

  Example: "There are two sides to every question"

• noun:   a lengthwise dressed half of an animal's carcass used for food
• noun:   a family line of descent

  Example: "He gets his brains from his father's side"

• noun:   one of two or more contesting groups

  Example: "The Confederate side was prepared to attack"

• noun:   a surface forming part of the outside of an object

  Example: "He examined all sides of the crystal"

• noun:   a line segment forming part of the perimeter of a plane figure

  Example: "The hypotenuse of a right triangle is always the longest side"

• noun:   a place within a region identified relative to a center or reference location

  Example: "They always sat on the right side of the church"

• noun:   (sports) the spin given to a ball by striking it on one side or releasing it with a sharp twist
• noun:   an elevated geological formation

  Example: "The house was built on the side of the mountain"

• verb:   take the side of; be on the side of

  Example: "Whose side are you on?"

• verb:   take sides with; align oneself with; show strong sympathy for
• name:  A surname (very rare: popularity rank in the U.S.: #67874)