Definition of encyclical noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ɪnˈsɪklɪkl//
; NAmE NAmE//ɪnˈsɪklɪkl//
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an official letter written by the Pope and sent to all Roman Catholic bishops Word Originmid 17th cent. (as an adjective): via late Latin from Greek enkuklios ‘circular, general’, from en- ‘in’ + kuklos ‘a circle’.
See the Oxford Advanced American Dictionary entry: encyclical