• noun:   an unknown and unpredictable phenomenon that causes an event to result one way rather than another

  Example: "Bad luck caused his downfall"

• noun:   an unknown and unpredictable phenomenon that leads to a favorable outcome

  Example: "It was my good luck to be there"

• noun:   your overall circumstances or condition in life (including everything that happens to you)

  Example: "The luck of the Irish"

• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5091)

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