Dominant.
The late period of the Roman Empire, following the principate, during which the emperor's rule became more explicitly autocratic and remaining vestiges of the Roman Republic were removed from the formal workings of government; the reign of any particular emperor during this period.
To enjoy a commanding position in some field
To exert an overwhelming guiding influence over something or someone
To overlook from a height.
To precede another node of a directed graph in all paths from the start of the graph to the other node.
To govern, rule or control by superior authority or power