What does it mean to "reign"?

To "reign" specifically refers to holding supreme power and authority, typically associated with a monarchy or sovereign leadership. When someone reigns, they are in a position of control and governance over a territory or group of people. This term conveys a sense of legitimacy and recognized power, suggesting that the individual is not only present in a leadership role but is also actively exercising that power.

While the other options discuss various forms of power and governance, they do not accurately define the idea of reigning. Contending for power implies a competitive struggle rather than direct authority, participating in democracy involves shared decision-making rather than sole rule, and serving in an advisory capacity suggests a position that supports rather than leads. Thus, the specificity of "to rule or hold supreme power" is what makes it the correct definition of "reign."