Born again, or to experience the new birth, is a phrase, particularly in evangelicalism, that refers to "spiritual rebirth", or a regeneration of the human spirit from the Holy Spirit, contrasted with physical birth.

What is the new birth?
The Washing of Regeneration
Titus 3: 4-7
Tit 3:4 But when the kindness and the love of God our Savior toward man appeared,
Tit 3:5 not by works of righteousness which we have done, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit,
Tit 3:6 whom He poured out on us abundantly through Jesus Christ our Savior,
Tit 3:7 that having been justified by His grace we should become heirs according to the hope of eternal life.

Titus 2:13
Isaiah 64:6
2Cointhians 5:17
John 13:10
John 15:3
Romans 6:4



Church Online: Charlene’s Outreach Ministries
Union Gospel Press
Believers Bible Commentary
esword.com
John Wesley
Matthew Henry Concise Commentary
Matthew Henry Commentary
Robert Hawker
https://www.biblestudytools.com/commentaries/matthew-henry-complete/