Definitions of sin:

• noun:   an act that is regarded by theologians as a transgression of God's will
• noun:   violent and excited activity

  Example: "They began to fight like sin"

• noun:   estrangement from god
• noun:   the 21st letter of the Hebrew alphabet
• noun:   (Akkadian) god of the moon; counterpart of Sumerian Nanna
• noun:   ratio of the opposite side to the hypotenuse of a right-angled triangle
• verb:   commit a sin; violate a law of God or a moral law
• verb:   commit a faux pas or a fault or make a serious mistake
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #15345)