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English definition of “ex cathedra”

ex cathedra

adjective [before noun], adverb     /ˌeks.kəˈθiː.drə/ formal
with complete authority, or said by the Pope to be true and so accepted by all members of the Roman Catholic ChurchControlling and being in chargeThe Roman Catholic ChurchChristian denominations
(Definition of ex cathedra adjectiveadverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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