Definition of "Mess" :
noun: a (large) military dining room where service personnel eat or relax
noun: a meal eaten in a mess hall by service personnel
noun: soft semiliquid food
"A mess of porridge."
noun: (often followed by of') a large number or amount or extent
noun: informal terms for a difficult situation
noun: a state of confusion and disorderliness
"The house was a mess."
verb: make a mess of or create disorder in
"He messed up his room."
verb: eat in a mess hall