Widespread celebration? (4)

I believe the answer is:

mass

I believe this clue is a double definition.

'widespread' is the first definition.
(as in mass media)

'celebration?' is the second definition.
(church service)

(Other definitions for mass that I've seen before include "state, briefly" , "Religious rite" , "Lump of material" , "seasonal midnight service?" , "Widespread" .)

I've seen this clue in The Times.

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