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authoritative

1 ENTRIES FOUND:
authoritative ˈθorəˌteɪtɪv/ adjective
authoritative
ˈθorəˌteɪtɪv/
adjective
Britannica Dictionary definition of AUTHORITATIVE
[more authoritative; most authoritative]
: having or showing impressive knowledge about a subject
: having the confident quality of someone who is respected or obeyed by other people

— authoritatively

adverb