Definition from Wiktionary, the free dictionary
Etymology 1 
mess (plural messes)
- (obsolete) 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; also, the food given to a beast at one time.
- A mess of pottage.
- 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.
- The wardroom mess.
- A set of four; — from the old practice of dividing companies into sets of four at dinner.
- (US) The milk given by a cow at one milking.
Mass; church service
Derived terms 
- (intransitive) To take meals with a mess.
- (intransitive) To belong to a mess.
- (intransitive) To eat (with others).
- I mess with the wardroom officers.
- (transitive) To supply with a mess.
Etymology 2 
- A disagreeable mixture or confusion of things; hence, a situation resulting from blundering or from misunderstanding; a disorder.
- He made a mess of it.
- My bedroom is such a mess, I need to tidy up.
- (colloquial) A large quantity or number.
- My boss dumped a whole mess of projects on my desk today.
- She brought back a mess of fish to fix for supper.
- (euphemistic) excrement
- There was dog mess all along the street.
- Parked under a tree, my car was soon covered in birds' mess.
- For usage examples of this term, see the citations page.
- See also Wikisaurus:disorder
a disagreeable mixture or confusion of things…
Derived terms 
From Old Irish mes.
- IPA: /meːs/
mess m (plural messyn)