Definition of authoritative

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rationale
Definition: (noun) an underlying reason or explanation.
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au·thor·i·ta·tive

(

-thôr

-t

-th

-, ô-thôr

-, ô-th

-) KEY

ADJECTIVE:

Having or arising from authority; official: an authoritative decree; authoritative sources.
Of acknowledged accuracy or excellence; highly reliable: an authoritative account of the revolution.
Wielding authority; commanding: the captain's authoritative manner.

OTHER FORMS:
au·thori·tative·ly(Adverb), au·thori·tative·ness(Noun)

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