Definitions
1.nounA title conferred on an adult male, usually when the name is unknown. Also used as a term of address, often by a parent to a young child."You may sit here, mister."
2.nounSomeone's business or function; an occupation, employment, trade.
3.nounA kind, type of.
4.nounNeed (of something).
5.nounNecessity; the necessary time.
6.nounA device that makes or sprays mist."Odessa D. uses a mister Sunday to fight the 106-degree heat at a NASCAR race in Fontana, California."