What does "change of heart" mean?

A change of one's opinion, belief or decision.

Change of heart

Common synonyms include: abject apology, about face, about-face, accommodation, adaptation, adjustment.

noun

noun ·Uncommon ·Advanced level

Noun

1
A change of one's opinion, belief or decision. idiomatic
"He quit work on Friday, but on Monday he had a change of heart and decided to come back."

"He quit work on Friday, but on Monday he had a change of heart and decided to come back."