concelebrate
verb
con·cel·e·brate kən-ˈse-lə-ˌbrāt 
kän-
concelebrated; concelebrating; concelebrates
transitive verb
: to participate in (a Eucharist) as a joint celebrant who recites the canon in unison with other celebrants
intransitive verb
: to participate as a celebrant in a concelebrated Eucharist
concelebration
(ˌ)kän-ˌse-lə-ˈbrā-shən
noun kən-
Example Sentences
Recent Examples on the Web Many were dressed in black and held white robes to concelebrate with Avella. 
Sophie Carson, Journal Sentinel, 31 Aug. 2022
Sophie Carson, Journal Sentinel, 31 Aug. 2022 Word History
Etymology
Medieval Latin concelebratus, past participle of concelebrare, from Latin, to frequent, celebrate, from com- + celebrare to celebrate
First Known Use
1847, in the meaning defined at intransitive sense