Definitions of carol:

• noun:   a joyful song (usually celebrating the birth of Christ)
• noun:   joyful religious song celebrating the birth of Christ
• verb:   sing carols

  Example: "They went caroling on Christmas Day"

• name:  A female given name (very common: 1 in 176 females; popularity rank in the U.S.: #18)
• name:  A male given name (rare: 1 in 16666 males; popularity rank in the U.S.: #919)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #17414)