LSJ Gloss:ἡγεμονίαa leading the way, going firstDodson:ἡγεμονίαrule, authorityrule, authority, sovereignty; a reign.
Strong's:ἡγεμονία government, i.e. (in time) official termDerivation: from G2232;KJV Usage: reign. G2232
TBESG:ἡγεμονίαreignG:N-F ἡγεμονία, -ας, ἡ (< ἡγεμών), [in LXX: Gen.36:30 (אַלּוּף), Refs Num.1:52 2:17, (דֶּגֶל), Refs Sir.7:4 10:1, 4Ma.6:33 Mac 13:4 * ;] rule, sovereignty: Luk.3:1.† (AS)
ἡγεμονία hēgemonia hayg-em-on-ee'-ah From G2232; government, that is, (in time) official termKJV Usage: reign.
ἡγεμών hēgemōn hayg-em-ohn' From G2233; a leader, that is, chief person (or figuratively place) of a provinceKJV Usage: governor, prince, ruler.