Repentance means to turn around.
Oxford's definition
is the action of repenting: sincere regret or remorse.
"Each person who turns to God in genuine repentance and faith will be saved."
Anyone who enters into the Kingdom of God has repented from the heart. There has been a soul conversion that has transformed them into a son or daughter of God. They have been born again.
These are not acts of repentance :
Countless souls will stand before Christ with everything to justify why they should come into His Kingdom, but they have never repented, been sorry for their sins, or placed their salvation alone on Christ's work on the cross.
Acts 2:37-38 KJV
Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do? [38] Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.