What is the meaning of Authority?

Power or right to make or enforce rules, give orders, or impose obligation; or a position having such power or right.

Persons, regarded collectively, who occupy official positions of power; police or law enforcement.

A reliable, definitive source of information on a subject.

Status as a trustworthy source of information, reputation for mastery or expertise; or claim to such status or reputation.

Official permission; authorisation to act in some capacity on behalf of a ruling entity.

A government-owned agency that runs a revenue-generating activity for public benefit.

Source: wiktionary.org