English

Definition of pace preposition from the Oxford Advanced Learner's Dictionary

 

pace2

 preposition
preposition
BrE BrE//ˈpɑːkeɪ//
 
; NAmE NAmE//ˈpɑːkeɪ//
 
; BrE BrE//ˈpɑːtʃeɪ//
 
; NAmE NAmE//ˈpɑːtʃeɪ//
 
; BrE BrE//ˈpeɪsi//
 
; NAmE NAmE//ˈpeɪsi//
 
(from Latin, formal)
 
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used before a person’s name to express polite disagreement with what they have said The evidence suggests, pace Professor Jones, that… (= Professor Jones has a different opinion). Word Origin Latin, literally ‘in peace’, ablative of pax, as in pace tua ‘by your leave’.
See the Oxford Advanced American Dictionary entry: pace