Definitions of blessing:

• noun:   the act of praying for divine protection
• noun:   the formal act of giving approval

  Example: "He gave the project his blessing"

• noun:   a desirable state

  Example: "Enjoy the blessings of peace"

• noun:   a ceremonial prayer invoking divine protection
• noun:   a short prayer of thanks before a meal
• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #5838)