Definitions

1. noun

A period of time following a Christian holy day or festival, especially one at which communion is administered.

“The church held a special service to mark the end of Lent, which was followed by a large aftermass celebration.”

2. noun

A gathering or meeting, especially one at which communion is administered, following a Christian holy day or festival.

“The priest led the congregation in the aftermass service, distributing bread and wine to the faithful.”