concelebrate

verb

1. To celebrate along with others

   “Here I could breake out into a boundleſſe race of oratory, in ſhrill trumpetting and concelebrating the royall magnificence of her gouernement, that for ſtate and ſtrict ciuill ordering, ſcant admitteth any riuals: but I feare it would be a theame diſpleaſant to the graue modeſty of the diſcreet preſent magiſtrates; and therefore conſultiuely I ouerſlip it, […]”

2. To take part in the Eucharist as a joint celebrant.

   “We had been told before the service that we were invited to move up to the altar if we wanted to concelebrate.”

   “A blog explaining the decision cited the shrine’s policy that women priests are not permitted to celebrate or concelebrate the eucharist there.”

3. (broadly)To take part in the Eucharist as a joint celebrant.