concelebrate
Concise Oxford English Dictionary © 2008 Oxford University Press:
concelebrate /kɒnˈsɛlɪbreɪt/
▶verb Christian Church officiate jointly at (a Mass).
– derivatives
concelebrant noun,
concelebration noun.
concelebrant noun,
concelebration noun.
– origin C19: from L. concelebrat-, concelebrare ‘celebrate together’.
'concelebrate' also found in these Oxford entries:

