authority
au-thor-i-ty
noun
A person or book considered an expert on a subject.
"She is a leading authority on British history."
noun
Official permission or approval to do something.
"You need written authority to proceed."
noun
An official organisation or person with power or control.
"The local authority manages public services."
noun
The power or right to give orders and enforce obedience.
"Police officers exercise considerable authority."
Thesaurus
Synonyms: sanction, authorisation, authorization, potency, dominance, say-so, assurance, self-assurance, sureness, confidence, self-confidence, bureau