Strong’s Greek
G1995 — epistrophe
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἐπιστροφή
epistrophe — pronounced ep-is-trof-ay'
from 1994; reversion, i.e. morally, revolution:--conversion. see GREEK for 1994
1 occurrence in the KJV.
Acts 15:3
And being brought on their way by the church, they passed through Phenice and Samaria, declaring the conversion of the Gentiles: and they caused great joy unto all the brethren.