In church, it means a lot (4)
I believe the answer is:
mass
This might be a double definition.
'in church' is the first definition.
'mass' can be an answer for 'church' (thesaurus). I am not sure about the 'in' bit.
'a lot' is the second definition.
(I know that lot can be written as mass)
'it means' acts as a link.
Can you help me to learn more?
(Other definitions for mass that I've seen before include "Accumulation" , "load" , "Religious celebration" , "what 13 15A [STANDARD MODEL] supposes 12 [HIGGS BOSON] gives other 5A [PARTICLES]s" , "Heap; religious service" .)