Hegemony is a noun that refers to a dominance or authority over others.
The Greek word hēgeisthai (hee GAYE sty) is a verb that means ‘to lead.’ By the mid-16th century the word had been imported into English where it referred to the control once wielded by the ancient Greek states and, in later centuries it was reapplied to other nations that rose to power. In contemporary use, hegemony may refer to any kind of dominance or power.
The hegemony of those large conglomerates over smaller business can make things difficult for a small business owner. Under dominance of larger companies, it isn’t easy to find a customer base.