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English definition of “ex cathedra”

ex cathedra

adjective [before noun], adverb uk   /ˌeks.kəˈθiː.drə/ formal us  
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 from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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