ἐπίσκοπος: one who watches over, an overseer, guardian; hitting the mark

ἐπίσκοπος a superintendent, i.e. Christian officer in genitive case charge of a (or the) church (literally or figuratively)
Derivation: from G1909 and G4649 (in the sense of G1983);
KJV Usage: bishop, overseer. G1909 G4649 G1983

Thayer:

1) an overseer
1a) a man charged with the duty of seeing that things to be done by others are done rightly, any curator, guardian or superintendent
1b) the superintendent, elder, or overseer of a Christian church

ἐπίσκοπος
episkopos
ep-is'-kop-os
From G1909 and G4649 (in the sense of G1983); a superintendent, that is, Christian officer in general charge of a (or the) church (literally or figuratively)
KJV Usage: bishop, overseer.