From Longman Dictionary of Contemporary Englishinterdenominationalin‧ter‧de‧nom‧i‧na‧tio‧nal /ˌɪntədənɒməˈneɪʃənəl $ ˌɪntərdənɑː-/ adjective RRCbetween or involving Christians from different groups
Examples from the Corpus
interdenominational• The second part is more a journey of interdenominational discovery.• Please join us for an interdenominational prayer service at 10:00 on Sundays. 