Mass; church service.

A quantity of food set on a table at one time; provision of
food for a person or party for one meal; as, a mess of pottage; also,
the food given to a beast at one time.

A number of persons who eat together, and for whom food is
prepared in common; especially, persons in the military or naval
service who eat at the same table; as, the wardroom mess.

A set of four; – from the old practice of dividing companies
into sets of four at dinner.

The milk given by a cow at one milking.

A disagreeable mixture or confusion of things; hence, a
situation resulting from blundering or from misunderstanding; as, he
made a mess of it.

To take meals with a mess; to belong to a mess; to eat
(with others); as, I mess with the wardroom officers.

To supply with a mess.