/kooh"leuhr/ , n.
1. a container or apparatus, as an insulated chest, in which something may be cooled or kept cool.
2. anything that cools or makes cool; refrigerant.
3. an air conditioner.
4. a tall drink, consisting of liquor, soda, and a fruit garnish.
5. See water cooler .
6. the cooler , Slang. jail: He was in the cooler for three months for petty theft.
7. Ice Hockey Slang. See penalty box .
[ 1565-75; COOL + -ER 1 ]