@Santa, if you're still following this thread, I just got a great definition of hegemony from an article by Christopher Layne I'm reading.
"What is hegemony? First, hegemony is about raw, hard power. Militarily, a
hegemon’s capabilities are such that “no other state has the wherewithal to put
up a serious ªght against it.”11 A hegemon also enjoys “economic supremacy”
in the international system and has a “preponderance of material resources.”12
Second, hegemony is about the dominant power’s ambitions. A hegemon acts
self-interestedly to safeguard its security, economic, and ideological interests.13
Third, hegemony is about polarity. Because of its overwhelming advantages in
relative military and economic power over other states in the international system,
a hegemon is the only great power in the system, which is therefore, by
deªnition, unipolar.14 Fourth, hegemony is about will. A hegemon purposefully
exercises its overwhelming power to impose order on the international
system.15 Finally, hegemony is fundamentally about structural change, because
“if one state achieves hegemony, the system ceases to be anarchic and
becomes hierarchic.”16 Yet, as Robert Gilpin notes, because “no state has ever
completely controlled an international system,” hegemony is a relative, not an
absolute, concept.17 When a great power attains hegemony, as, for example,
the United States did in Western Europe afterWorldWar II, the system is more
hierarchic—and less anarchic—than it would be in the absence of hegemonic
power.18"