Santification: Is It a Definitive Experience or a Process?

There are many Evangelicals Theologians and Church Demonations who has defined Santification as a definitive experience (complete) once a person recieves the Holy Spirit, while other define Santification as a process throughout the believers life as a Christian, after they recieve the Holy Spirit. Scriptures are clear in it's definition of Santification. Let's look at the Word of God and understand it's meaning of Santification, and God's purpose for it's meaning in the life of a believer.