authoritative
/əˈθɔrəˌteɪtɪv/
adjective
- Having or showing the power or right to give orders, make decisions, and enforce obedience.
- The coach is the most authoritative person on the team when it comes to game strategy.
- She spoke with an authoritative tone that left no room for argument.
- The principal's authoritative voice made everyone in the hallway stop talking.
- Having reliable, accurate, and trustworthy knowledge; considered an expert.
- The scientist published an authoritative study on climate change.
- This textbook is considered the authoritative source on ancient Roman history.
- For medical advice, it's best to consult an authoritative website like the CDC.
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