• A sacrament of the New Testament
• Ordained by Jesus Christ
• To be outwardly administered with water
• For solemn admission into the visible Church
• A sign and seal of the Covenant of Grace
• A symbol of regeneration and newness of life
• For both professing believers and their children
• Not neccessary for salvation (though neglect is a great sin)
• Only to be administered once to any person.

Here is a more detailed definition of baptism, according to the WCF.

What is the proper mode of baptism?
- Sprinkle, Pour, or Immerse?

Who are the proper subjects of baptism?
- Should infants be baptized? Or professing believers only?